-Add README for building go sample application

build/go/rules.gni

 # 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.
 
 declare_args() {
   # By default, there is no go build tool, because go builds are not supported.
   go_build_tool = ""
 }
 
 # Declare a go test binary target.
@@ skipping 35 matching lines @@
     # and clean up the temporary build directory.
     build_dir = "${target_out_dir}/${target_name}_build"
     args = [
       "--", 
       "${go_build_tool}",
       rebase_path(build_dir, root_build_dir),
       rebase_path(target_out_dir, root_build_dir) + "/${target_name}",
       rebase_path("//", root_build_dir),
       "-I" + rebase_path("//"),
       " -L" + rebase_path(target_out_dir) +
-      " -L" + rebase_path(root_build_dir + "/obj/third_party/libevent") +
       " -l" + static_library_name +
-      " -lstdc++ -lpthread -lm -lglib-2.0 -levent",
+      " -lstdc++ -lpthread -lm -lglib-2.0",
       "test", "-c",
     ] + rebase_path(invoker.sources, build_dir)
   }
 }
 
 template("go_shared_library") {
   # Only available on android for now.
   assert(is_android)
   assert(defined(invoker.sources))
   assert(go_build_tool != "")
@@ skipping 20 matching lines @@
       rebase_path(build_dir, root_build_dir),
       rebase_path(target_out_dir, root_build_dir) + "/${target_name}",
       rebase_path("//", root_build_dir),
       "-I" + rebase_path("//"),
       " -L" + rebase_path(target_out_dir) +
        " -l" + static_library_name + "",
       "build -ldflags=-shared",
     ] + rebase_path(invoker.sources, build_dir)
   }
 }