cmd/go/internal/imports: update goos/goarch lists for Go 1.11

Change-Id: I3b64d18ec95cd0fee8307cb7ab6ef4a2e6a3ca5f
Reviewed-on: https://go-review.googlesource.com/116315
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>

vendor/cmd/go/internal/imports/build.go

diff --git a/vendor/cmd/go/internal/imports/build.go b/vendor/cmd/go/internal/imports/build.go
index 244e8dd..bb40f2b 100644
--- a/vendor/cmd/go/internal/imports/build.go
+++ b/vendor/cmd/go/internal/imports/build.go
@@ -181,5 +181,5 @@
 	}
 }
 
-const goosList = "android darwin dragonfly freebsd linux nacl netbsd openbsd plan9 solaris windows zos "
-const goarchList = "386 amd64 amd64p32 arm armbe arm64 arm64be ppc64 ppc64le mips mipsle mips64 mips64le mips64p32 mips64p32le ppc s390 s390x sparc sparc64 "
+const goosList = "android darwin dragonfly freebsd js linux nacl netbsd openbsd plan9 solaris windows zos "
+const goarchList = "386 amd64 amd64p32 arm armbe arm64 arm64be ppc64 ppc64le mips mipsle mips64 mips64le mips64p32 mips64p32le ppc riscv riscv64 s390 s390x sparc sparc64 wasm "