libgo: update to go1.15rc1

Change-Id: Iab1ff0b7d52efdb3310c859605d2cfc75c1a903e
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/245157
Reviewed-by: Cherry Zhang <cherryyz@google.com>
diff --git a/libgo/go/crypto/tls/testdata/Server-TLSv12-ExportKeyingMaterial b/libgo/go/crypto/tls/testdata/Server-TLSv12-ExportKeyingMaterial
index ecf765b..c9f0c5c 100644
--- a/libgo/go/crypto/tls/testdata/Server-TLSv12-ExportKeyingMaterial
+++ b/libgo/go/crypto/tls/testdata/Server-TLSv12-ExportKeyingMaterial
@@ -1,18 +1,17 @@
 >>> Flow 1 (client to server)
-00000000  16 03 01 00 cf 01 00 00  cb 03 03 62 4c 73 03 fd  |...........bLs..|
-00000010  24 98 d0 f6 41 49 83 94  04 c8 17 51 3e 18 5d 6d  |$...AI.....Q>.]m|
-00000020  8a b8 52 c0 cf 0b 60 1e  02 53 d2 00 00 38 c0 2c  |..R...`..S...8.,|
+00000000  16 03 01 00 bd 01 00 00  b9 03 03 7e 75 ea 1f ec  |...........~u...|
+00000010  47 ee de 51 9d 11 00 77  5b 1b fb 7e 05 22 0a 7a  |G..Q...w[..~.".z|
+00000020  74 bc 6a d1 8a 67 03 a1  ae c9 23 00 00 38 c0 2c  |t.j..g....#..8.,|
 00000030  c0 30 00 9f cc a9 cc a8  cc aa c0 2b c0 2f 00 9e  |.0.........+./..|
 00000040  c0 24 c0 28 00 6b c0 23  c0 27 00 67 c0 0a c0 14  |.$.(.k.#.'.g....|
 00000050  00 39 c0 09 c0 13 00 33  00 9d 00 9c 00 3d 00 3c  |.9.....3.....=.<|
-00000060  00 35 00 2f 00 ff 01 00  00 6a 00 00 00 0e 00 0c  |.5./.....j......|
-00000070  00 00 09 31 32 37 2e 30  2e 30 2e 31 00 0b 00 04  |...127.0.0.1....|
-00000080  03 00 01 02 00 0a 00 0c  00 0a 00 1d 00 17 00 1e  |................|
-00000090  00 19 00 18 00 23 00 00  00 16 00 00 00 17 00 00  |.....#..........|
-000000a0  00 0d 00 30 00 2e 04 03  05 03 06 03 08 07 08 08  |...0............|
-000000b0  08 09 08 0a 08 0b 08 04  08 05 08 06 04 01 05 01  |................|
-000000c0  06 01 03 03 02 03 03 01  02 01 03 02 02 02 04 02  |................|
-000000d0  05 02 06 02                                       |....|
+00000060  00 35 00 2f 00 ff 01 00  00 58 00 0b 00 04 03 00  |.5./.....X......|
+00000070  01 02 00 0a 00 0c 00 0a  00 1d 00 17 00 1e 00 19  |................|
+00000080  00 18 00 23 00 00 00 16  00 00 00 17 00 00 00 0d  |...#............|
+00000090  00 30 00 2e 04 03 05 03  06 03 08 07 08 08 08 09  |.0..............|
+000000a0  08 0a 08 0b 08 04 08 05  08 06 04 01 05 01 06 01  |................|
+000000b0  03 03 02 03 03 01 02 01  03 02 02 02 04 02 05 02  |................|
+000000c0  06 02                                             |..|
 >>> Flow 2 (server to client)
 00000000  16 03 03 00 3b 02 00 00  37 03 03 00 00 00 00 00  |....;...7.......|
 00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
@@ -58,38 +57,38 @@
 00000290  d4 db fe 3d 13 60 84 5c  21 d3 3b e9 fa e7 16 03  |...=.`.\!.;.....|
 000002a0  03 00 ac 0c 00 00 a8 03  00 1d 20 2f e5 7d a3 47  |.......... /.}.G|
 000002b0  cd 62 43 15 28 da ac 5f  bb 29 07 30 ff f6 84 af  |.bC.(.._.).0....|
-000002c0  c4 cf c2 ed 90 99 5f 58  cb 3b 74 08 04 00 80 2d  |......_X.;t....-|
-000002d0  54 87 fa c9 e5 97 ad a0  6d 54 89 b1 37 24 af df  |T.......mT..7$..|
-000002e0  0f 3e ef 34 f7 6a 5f 1b  06 a5 b9 b4 6d 46 7f b1  |.>.4.j_.....mF..|
-000002f0  ab e4 5c dd c1 3f 98 93  61 e5 81 8a 6c 3d 2f b3  |..\..?..a...l=/.|
-00000300  3c 59 b9 78 45 ba bd 02  b1 a0 72 cb c3 59 b1 55  |<Y.xE.....r..Y.U|
-00000310  da a3 a8 ea ac b2 8a c0  23 e7 e7 ca c9 9f 5d 1b  |........#.....].|
-00000320  a8 b4 7c c3 9f cf c5 3c  5f 07 d8 49 8c 95 f1 ce  |..|....<_..I....|
-00000330  27 d0 d1 3f 74 44 df e4  12 ea e2 0e 43 6e d2 53  |'..?tD......Cn.S|
-00000340  7e 39 41 d7 71 c1 3c 2c  a6 0b 4e e3 4d 9a 02 16  |~9A.q.<,..N.M...|
+000002c0  c4 cf c2 ed 90 99 5f 58  cb 3b 74 08 04 00 80 d9  |......_X.;t.....|
+000002d0  5f d9 85 1f 13 34 60 85  c8 eb 27 79 14 ed 84 77  |_....4`...'y...w|
+000002e0  98 60 72 ce ee b9 92 87  50 4b 4a f8 25 7f 8d 92  |.`r.....PKJ.%...|
+000002f0  16 2a 19 65 96 b4 30 af  fd 1b fe 1c 02 1f f4 77  |.*.e..0........w|
+00000300  6f 63 53 7c 54 a0 89 5d  e9 32 b3 a9 5f e6 4b 60  |ocS|T..].2.._.K`|
+00000310  8b b1 c8 d2 61 8b 19 59  f3 5a b4 e2 71 16 b8 32  |....a..Y.Z..q..2|
+00000320  1f 8c 74 e2 4e 17 56 7e  69 01 39 8c c1 cf c7 0b  |..t.N.V~i.9.....|
+00000330  56 c6 f6 c0 37 7b 3d 65  48 40 6b a0 67 e6 cd 70  |V...7{=eH@k.g..p|
+00000340  ce 8c 73 d4 e9 ba c0 04  18 b3 37 06 71 66 72 16  |..s.......7.qfr.|
 00000350  03 03 00 04 0e 00 00 00                           |........|
 >>> Flow 3 (client to server)
-00000000  16 03 03 00 25 10 00 00  21 20 37 47 1b 8d ef 6c  |....%...! 7G...l|
-00000010  dc 59 b2 a5 a2 f6 8e 1b  f6 1b ab da ec 9c a7 ff  |.Y..............|
-00000020  4a f9 0e 9b 02 b0 8f bc  a1 55 14 03 03 00 01 01  |J........U......|
-00000030  16 03 03 00 28 a2 53 52  8b df 86 63 d9 f8 a8 7e  |....(.SR...c...~|
-00000040  f5 b4 19 1a 5d 02 9a 48  94 68 6d a2 90 13 93 42  |....]..H.hm....B|
-00000050  87 52 92 50 7c 45 91 b9  91 49 83 66 a6           |.R.P|E...I.f.|
+00000000  16 03 03 00 25 10 00 00  21 20 d5 13 c6 90 e0 4a  |....%...! .....J|
+00000010  25 2f 5d cd 02 d8 fd 14  61 78 dd fc 42 57 ce bd  |%/].....ax..BW..|
+00000020  e0 47 b8 cf 42 59 1c 7f  1f 1e 14 03 03 00 01 01  |.G..BY..........|
+00000030  16 03 03 00 28 96 2c 78  25 ee 20 88 53 69 57 96  |....(.,x%. .SiW.|
+00000040  d9 d2 53 6c 5b 5b e9 db  7d 0a 7c f9 16 27 43 df  |..Sl[[..}.|..'C.|
+00000050  a9 e2 a6 e5 be c5 e9 d5  ff df 66 6b 81           |..........fk.|
 >>> Flow 4 (server to client)
-00000000  16 03 03 00 82 04 00 00  7e 00 00 00 00 00 78 50  |........~.....xP|
+00000000  16 03 03 00 8b 04 00 00  87 00 00 00 00 00 81 50  |...............P|
 00000010  46 ad c1 db a8 38 86 7b  2b bb fd d0 c3 42 3e 00  |F....8.{+....B>.|
 00000020  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 94  |................|
-00000030  6f ec 80 83 61 a2 90 f4  4c 03 c8 09 b9 a6 c6 6f  |o...a...L......o|
-00000040  c7 52 57 3f 3f 92 71 f3  f8 02 43 69 19 f0 bf 78  |.RW??.q...Ci...x|
-00000050  6a 00 cc 0a 96 6f 80 5d  62 42 9b 6b 7c 00 e0 26  |j....o.]bB.k|..&|
-00000060  90 ef d9 26 f1 33 94 6e  13 9a ec be 91 00 1e 64  |...&.3.n.......d|
-00000070  eb 12 ae b9 74 f9 85 d1  b7 91 bd e1 e2 da ac b0  |....t...........|
-00000080  71 ca 1b 65 1a e7 83 14  03 03 00 01 01 16 03 03  |q..e............|
-00000090  00 28 00 00 00 00 00 00  00 00 fa e4 1b 3b 28 9b  |.(...........;(.|
-000000a0  f8 28 d7 26 d7 6a 67 33  1f 4a 39 d9 ac 59 6f fc  |.(.&.jg3.J9..Yo.|
-000000b0  2b 84 6c b9 73 70 9b 30  8c d0 17 03 03 00 25 00  |+.l.sp.0......%.|
-000000c0  00 00 00 00 00 00 01 0c  6e 13 cf 3d 10 65 2f e5  |........n..=.e/.|
-000000d0  4f fd f9 b6 34 11 c2 05  60 d5 16 66 68 65 29 fa  |O...4...`..fhe).|
-000000e0  e6 97 e4 dc 15 03 03 00  1a 00 00 00 00 00 00 00  |................|
-000000f0  02 58 9a 0d 41 6f 0f 72  c7 43 16 46 83 dd 26 5f  |.X..Ao.r.C.F..&_|
-00000100  3a ee 1a                                          |:..|
+00000030  6f ec 80 83 51 ed 14 ef  68 ca 42 c5 4c c7 ea d3  |o...Q...h.B.L...|
+00000040  9f e6 77 db 30 96 5c e3  bc f8 b7 c7 74 9d 0e 97  |..w.0.\.....t...|
+00000050  cf 3c ec 76 c8 9e ad 0c  49 86 9e 4f 4d 56 ce 95  |.<.v....I..OMV..|
+00000060  7f 75 79 aa dd 8e 66 8f  1f d8 01 2d c1 49 38 16  |.uy...f....-.I8.|
+00000070  b3 7a 6b 8d 3d ba 2b 81  4c 1c 75 c3 06 bb 8c 1e  |.zk.=.+.L.u.....|
+00000080  df 59 35 29 5b d1 54 cc  5c 6b 37 74 29 19 0f 8b  |.Y5)[.T.\k7t)...|
+00000090  14 03 03 00 01 01 16 03  03 00 28 00 00 00 00 00  |..........(.....|
+000000a0  00 00 00 c7 19 9a c9 cc  16 3b 8f b7 52 de 4c ab  |.........;..R.L.|
+000000b0  90 83 b1 b5 60 0d c0 49  c4 28 f7 1d 1f e9 e0 b1  |....`..I.(......|
+000000c0  21 a1 49 17 03 03 00 25  00 00 00 00 00 00 00 01  |!.I....%........|
+000000d0  46 fe 03 14 ad 32 d5 ff  89 1f 08 15 6b 44 4f 2d  |F....2......kDO-|
+000000e0  5e d6 f1 35 d9 c4 c4 cc  bf 5a 26 df a6 15 03 03  |^..5.....Z&.....|
+000000f0  00 1a 00 00 00 00 00 00  00 02 4f 7b 8e 22 3c 85  |..........O{."<.|
+00000100  5c 41 f5 17 0d dd c8 41  b5 ef 5a 4c              |\A.....A..ZL|