Reland (rev 7259) "Convert AcmReceiverTest to new AudioCoding interface"

Was reverted by mistake in 7260. Actual culprit was 7258.

BUG=3520
R=henrik.lundin@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/22719004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7272 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/modules.gyp b/webrtc/modules/modules.gyp
index 4086299..1025d01 100644
--- a/webrtc/modules/modules.gyp
+++ b/webrtc/modules/modules.gyp
@@ -104,6 +104,7 @@
           'sources': [
             'audio_coding/main/acm2/acm_opus_unittest.cc',
             'audio_coding/main/acm2/acm_receiver_unittest.cc',
+            'audio_coding/main/acm2/acm_receiver_unittest_oldapi.cc',
             'audio_coding/main/acm2/audio_coding_module_unittest.cc',
             'audio_coding/main/acm2/call_statistics_unittest.cc',
             'audio_coding/main/acm2/initial_delay_manager_unittest.cc',