go: update go build 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 library.
@@ skipping 73 matching lines @@
              rebase_path(root_out_dir, root_build_dir),
              "-I" + rebase_path("//"),
              "-L" + rebase_path(target_out_dir) + " -l" + static_library_name +
                  " -lstdc++ -lpthread -lm -lglib-2.0 -lrt",
              "test",
              "-c",
            ] + rebase_path(invoker.sources, build_dir)
   }
 }
 
-template("go_shared_library") {
+template("go_mojo_application") {
   # Only available on android for now.
   assert(is_android)
   assert(defined(invoker.sources))
   assert(go_build_tool != "")
 
   static_library_name = target_name + "_static_library"
-
   static_library(static_library_name) {
     complete_static_lib = true
     deps = invoker.deps
   }
 
-  action(target_name) {
+  go_library_name = target_name + "_go"
+  action(go_library_name) {
     deps = [
-      ":$static_library_name",
+      ":${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 =
         [
           "--android",
           "--",
           "${go_build_tool}",
           rebase_path(build_dir, root_build_dir),
           rebase_path(target_out_dir, root_build_dir) + "/${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)
   }
+
+  copy(target_name) {
+    deps = [
+      ":${go_library_name}",
+    ]
+    sources = [
+      "${target_out_dir}/${go_library_name}",
+    ]
+    outputs = [
+      "${root_out_dir}/${target_name}.mojo",
+    ]
+  }
 }