Enable ARM optimizations for Opus in iOS

third_party/opus/opus_srcs_rtcd.gypi

 # 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.
 
 {
   'sources': [
     'src/celt/arm/arm_celt_map.c',
     'src/celt/arm/armcpu.c',
     'src/celt/arm/armcpu.h',
-    'src/celt/arm/fixed_armv4.h',
-    'src/celt/arm/fixed_armv5e.h',
-    'src/celt/arm/kiss_fft_armv4.h',
-    'src/celt/arm/kiss_fft_armv5e.h',
-    'src/celt/pitch_arm.h',
-    'src/silk/arm/macro_armv4.h',
-    'src/silk/arm/macro_armv5e.h',
-    'src/silk/arm/SigProc_FIX_armv4.h',
-    'src/silk/arm/SigProc_FIX_armv5e.h',
     '<(INTERMEDIATE_DIR)/celt_pitch_xcorr_arm_gnu.S',
   ],
   'actions': [
     {
       'action_name': 'convert_assembler',
       'inputs': [
         'src/celt/arm/arm2gnu.pl',
         'src/celt/arm/celt_pitch_xcorr_arm.s',
       ],
       'outputs': [
         '<(INTERMEDIATE_DIR)/celt_pitch_xcorr_arm_gnu.S',
       ],
       'action': [
         'bash',
         '-c',
         'perl src/celt/arm/arm2gnu.pl src/celt/arm/celt_pitch_xcorr_arm.s | sed "s/OPUS_ARM_MAY_HAVE_[A-Z]*/1/g" | sed "/.include/d" > <(INTERMEDIATE_DIR)/celt_pitch_xcorr_arm_gnu.S',
       ],
       'message': 'Convert Opus assembler for ARM.'
     },
   ],
 }