Ported assembly coding in APM from Android to iOS.

Bugs=none
Test=trybots, and offline file bit-exact tests.
Review URL: https://webrtc-codereview.appspot.com/1066009

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3563 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_processing/audio_processing.gypi

@@ -174,11 +174,10 @@
           'ns/nsx_core_neon.c',
         ],
         'conditions': [
-          ['OS=="android"', {
+          ['OS=="android" or OS=="ios"', {
             'dependencies': [
               'audio_processing_offsets',
             ],
-            # TODO(kma): port this block from Android into other build systems.
             'sources': [
               'aecm/aecm_core_neon.S',
               'ns/nsx_core_neon.S',
@@ -192,7 +191,7 @@
         ],
       }],
       'conditions': [
-        ['OS=="android"', {
+        ['OS=="android" or OS=="ios"', {
           'targets': [{
             'target_name': 'audio_processing_offsets',
             'type': 'none',