Add Go build support for GN.

mojo/BUILD.gn

Index: mojo/BUILD.gn
diff --git a/mojo/BUILD.gn b/mojo/BUILD.gn
index 2be3382754f4f9df7caf8a1a8946c3ff202f67b8..12f5408bd76194014212bcc0b97288a8d84d707e 100644
--- a/mojo/BUILD.gn
+++ b/mojo/BUILD.gn
@@ -17,6 +17,7 @@ group("mojo") {
   if (is_linux) {
     deps += [
       "//mojo/python",

[brettw, 2014/09/16 22:58:55]

Sort

[tburkard, 2014/09/17 12:06:45]

Done.

+      "//mojo/go",
     ]
   }
 }