Re-enable WebRtcIsacfix_AllpassFilter2FixDec16Neon

webrtc/modules/audio_coding/codecs/isac/isacfix.gypi

 # Copyright (c) 2012 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.
 
 {
   'targets': [
@@ skipping 119 matching lines @@
       'targets': [
         {
           'target_name': 'isac_neon',
           'type': 'static_library',
           'includes': ['../../../../build/arm_neon.gypi',],
           'dependencies': [
             '<(webrtc_root)/common_audio/common_audio.gyp:common_audio',
           ],
           'sources': [
             'fix/source/entropy_coding_neon.c',
+            'fix/source/filterbanks_neon.c',
             'fix/source/filters_neon.c',
             'fix/source/lattice_neon.c',
             'fix/source/transform_neon.c',
           ],
-          'conditions': [
-            # Disable AllpassFilter2FixDec16Neon function due to a clang bug.
-            # For more details refer to:
-            # https://code.google.com/p/webrtc/issues/detail?id=4567
-            ['target_arch!="arm64" or clang==0', {
-              'sources': ['fix/source/filterbanks_neon.c',],
-            }]
-          ],
         },
       ],
     }],
   ],
 }