[PATCH] Add llvm-go tool.

[Rui Ueyama]

================
Comment at: tools/llvm-go/llvm-go.go:223
@@ +222,3 @@
+	done := false
+	for !done {
+		switch {
----------------
Go supports Java-like labeled for loop.

  DONE:
  for {
    switch {
    ...
    default:
      break DONE;
    }
  }

http://reviews.llvm.org/D5902