Adding target to track asm_defines.h

webrtc/system_wrappers/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 if (is_android) {
   import("//build/config/android/config.gni")
@@ skipping 112 matching lines @@
 
 rtc_source_set("cpu_features_api") {
   sources = [
     "include/cpu_features_wrapper.h",
   ]
   deps = [
     "..:webrtc_common",
   ]
 }
 
+rtc_source_set("asm_defines") {
+  sources = [
+    "include/asm_defines.h",
+  ]
+}
+
 rtc_source_set("field_trial_api") {
   sources = [
     "include/field_trial.h",
   ]
 }
 
 rtc_source_set("metrics_api") {
   sources = [
     "include/metrics.h",
   ]
@@ skipping 84 matching lines @@
       "//testing/gtest",
     ]
 
     if (is_android) {
       deps += [ "//testing/android/native_test:native_test_support" ]
 
       shard_timeout = 900
     }
   }
 }