Include files from webrtc/.. paths in common_audio/

BUG=1662
R=tina.legrand@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1535005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4107 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/common_audio/signal_processing/get_hanning_window.c b/common_audio/signal_processing/get_hanning_window.c
index ef095d1..519b665 100644
--- a/common_audio/signal_processing/get_hanning_window.c
+++ b/common_audio/signal_processing/get_hanning_window.c
@@ -15,7 +15,7 @@
  *
  */
 
-#include "signal_processing_library.h"
+#include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
 
 // Hanning table with 256 entries
 static const int16_t kHanningTable[] = {