Specify inputs and testonly in Go GN rules

mojo/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 11 matching lines @@
 
 template("go_test_binary") {
   # Only available on linux for now.
   assert(is_linux)
   assert(defined(invoker.sources))
   assert(go_build_tool != "")
 
   static_library_name = target_name + "_static_library"
 
   static_library(static_library_name) {
+    testonly = true
     sources = invoker.static_library_sources
     deps = invoker.deps
     complete_static_lib = true
   }
 
   action(target_name) {
+    testonly = true
     deps = [
       ":$static_library_name",
     ]
     script = "//mojo/go/go.py"
+    inputs = invoker.sources
     outputs = [
       "${target_out_dir}/${target_name}",
     ]
 
     # Since go test does not permit specifying an output directory or output
     # binary name, we create a temporary build directory, and the python
     # script will later identify the output, copy it to the target location,
     # and clean up the temporary build directory.
     build_dir = "${target_out_dir}/${target_name}_build"
     args = [
@@ skipping 23 matching lines @@
   static_library(static_library_name) {
     complete_static_lib = true
     deps = invoker.deps
   }
 
   action(target_name) {
     deps = [
       ":$static_library_name",
     ]
     script = "//mojo/go/go.py"
+    inputs = invoker.sources
     outputs = [
       "${target_out_dir}/${target_name}",
     ]
 
     # Since go test does not permit specifying an output directory or output
     # binary name, we create a temporary build directory, and the python
     # script will later identify the output, copy it to the target location,
     # and clean up the temporary build directory.
     build_dir = "${target_out_dir}/${target_name}_build"
     args = [
              "--",
              "CGO_ENABLED=1 GOOS=android GOARCH=arm GOARM=7 ${go_build_tool}",
              rebase_path(build_dir, root_build_dir),
              rebase_path(target_out_dir, root_build_dir) + "/${target_name}",
              rebase_path("//", root_build_dir),
              rebase_path(root_out_dir, 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)
   }
 }