Fix missing dependency in audioproc.

TBR=bjornv@webrtc.org

Review URL: http://webrtc-codereview.appspot.com/300006

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1095 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/src/modules/audio_processing/apm_tests.gypi b/src/modules/audio_processing/apm_tests.gypi
index 333a122..f9b21d2 100644
--- a/src/modules/audio_processing/apm_tests.gypi
+++ b/src/modules/audio_processing/apm_tests.gypi
@@ -53,6 +53,7 @@
           'type': 'executable',
           'dependencies': [
             'audio_processing',
+            'audioproc_debug_proto',
             '<(webrtc_root)/system_wrappers/source/system_wrappers.gyp:system_wrappers',
             '<(webrtc_root)/../testing/gtest.gyp:gtest',
           ],