internal/syscall/unix: add randomTrap for m68k

Patch by Andrwas Schwab.

Change-Id: Ib7b3f903e7010dbf8b884c4f9018cb9ecfe6e9c0
Reviewed-on: https://go-review.googlesource.com/38456
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/libgo/go/internal/syscall/unix/getrandom_linux_m68k.go b/libgo/go/internal/syscall/unix/getrandom_linux_m68k.go
new file mode 100644
index 0000000..5559d30
--- /dev/null
+++ b/libgo/go/internal/syscall/unix/getrandom_linux_m68k.go
@@ -0,0 +1,9 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package unix
+
+// Linux getrandom system call number.
+// See GetRandom in getrandom_linux.go.
+const randomTrap uintptr = 352