Change include path

Message:
The background, when we make a binary delivery, typically user puts header files and
library file in a flat folder, so include "x/y/z/header.h" doesn't work.

I know it's against google style, but it's something we have to workaround.
I can also do
#ifdef ANDROID
#include "audio_device_defines.h"
#include "module.h"
#else
#include "modules/audio_device/main/interface/audio_device_defines.h"
#include "modules/interface/module.h"
#endif

This is a workaround before we build everything from source which will happen
eventually, but might be couple months later.

Description:
Change include path to make it build in a standalone delivery.

BUG=None
TEST=local test
Review URL: https://webrtc-codereview.appspot.com/778004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@2720 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/src/modules/audio_device/main/interface/audio_device.h b/src/modules/audio_device/main/interface/audio_device.h
index 30b776d..3be59b0 100644
--- a/src/modules/audio_device/main/interface/audio_device.h
+++ b/src/modules/audio_device/main/interface/audio_device.h
@@ -11,8 +11,16 @@
 #ifndef MODULES_AUDIO_DEVICE_MAIN_INTERFACE_AUDIO_DEVICE_H_
 #define MODULES_AUDIO_DEVICE_MAIN_INTERFACE_AUDIO_DEVICE_H_
 
+#ifdef WEBRTC_ANDROID
+// TODO(leozwang): It's a temporal workaround for binary delivery,
+// remove the following two lines once we can build from source
+// on Android.
+#include "audio_device_defines.h"
+#include "module.h"
+#else
 #include "modules/audio_device/main/interface/audio_device_defines.h"
 #include "modules/interface/module.h"
+#endif
 
 namespace webrtc {