go/bindings: adding validation tests input format parser

mojo/go/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/go/rules.gni")
 
 if (is_android) {
   group("go") {
     deps = [
       ":go_sample_app",
@@ skipping 11 matching lines @@
 } else if (is_linux) {
   group("go") {
     deps = [
       ":system_test",
     ]
   }
   go_test_binary("system_test") {
     sources = [
       "tests/message_test.go",
       "tests/system_test.go",
+      "tests/testutil.go",
+      "tests/testutil_test.go",
     ]
     static_library_sources = [
       "c_embedder/c_embedder.cc",
       "c_embedder/c_embedder.h",
     ]
     deps = [
       "//mojo/edk/system",
     ]
   }
 }