Implement CPU feature detection for ARM Linux.

webrtc/system_wrappers/cpu_features_linux.gyp

Index: webrtc/system_wrappers/cpu_features_linux.gyp
diff --git a/webrtc/system_wrappers/cpu_features_webrtc.gyp b/webrtc/system_wrappers/cpu_features_linux.gyp
similarity index 64%
copy from webrtc/system_wrappers/cpu_features_webrtc.gyp
copy to webrtc/system_wrappers/cpu_features_linux.gyp
index 064b3cf049c116e5efd918a53a8f41882f7dbbe0..85c7c8af70ebbf51b961f6928655c2c506217ff9 100644
--- a/webrtc/system_wrappers/cpu_features_webrtc.gyp
+++ b/webrtc/system_wrappers/cpu_features_linux.gyp
@@ -1,4 +1,4 @@
-# Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+# Copyright (c) 2016 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
@@ -8,19 +8,19 @@
 
 {
   'conditions': [
-    ['OS=="android"', {
+    ['OS=="linux"', {
       'targets': [
         {
-          'target_name': 'cpu_features_android',
+          'target_name': 'cpu_features_linux',
           'type': 'static_library',
           'sources': [
-            'source/cpu_features_android.c',
-          ],
-          'dependencies': [
-            '../../build/android/ndk.gyp:cpu_features',
+            'source/cpu_features_linux.c',
           ],
         },
       ],
+      'dependencies': [
+        '<(webrtc_root)/common.gyp:webrtc_common',
+      ],
     }],
   ], # conditions
 }