Move the test template to //testing/test.gni (part 2)

rlz/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.
 
 # Note that this build file assumes rlz_use_chrome_net which is a condition in
 # the GYP file, but is always true for Chrome builds.
 
+import("//testing/test.gni")
+
 config("rlz_config") {
   defines = [ "RLZ_NETWORK_IMPLEMENTATION_CHROME_NET" ]
 }
 
 source_set("rlz_lib") {
   sources = [
     "chromeos/lib/machine_id_chromeos.cc",
     "chromeos/lib/rlz_value_store_chromeos.cc",
     "chromeos/lib/rlz_value_store_chromeos.h",
     "ios/lib/machine_id_ios.cc",
@@ skipping 117 matching lines @@
     sources = [
       "win/dll/dll_main.cc",
       "win/dll/exports.cc",
     ]
     deps = [
       ":rlz_lib",
       "//third_party/zlib",
     ]
   }
 }