Move aec_resampler.c to be built using C++

webrtc/modules/audio_processing/audio_processing.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.
 
 {
   'variables': {
@@ skipping 19 matching lines @@
         '<(webrtc_root)/common_audio/common_audio.gyp:common_audio',
         '<(webrtc_root)/modules/modules.gyp:isac',
         '<(webrtc_root)/system_wrappers/system_wrappers.gyp:system_wrappers',
       ],
       'sources': [
         'aec/aec_core.cc',
         'aec/aec_core.h',
         'aec/aec_core_internal.h',
         'aec/aec_rdft.c',
         'aec/aec_rdft.h',
-        'aec/aec_resampler.c',
+        'aec/aec_resampler.cc',
         'aec/aec_resampler.h',
         'aec/echo_cancellation.cc',
         'aec/echo_cancellation_internal.h',
         'aec/echo_cancellation.h',
         'aecm/aecm_core.c',
         'aecm/aecm_core.h',
         'aecm/echo_control_mobile.c',
         'aecm/echo_control_mobile.h',
         'agc/agc.cc',
         'agc/agc.h',
@@ skipping 218 matching lines @@
         'sources': [
           'aec/aec_core_neon.cc',
           'aec/aec_rdft_neon.c',
           'aecm/aecm_core_neon.c',
           'ns/nsx_core_neon.c',
         ],
       }],
     }],
   ],
 }