fix libgui header location

Change-Id: Iec71706cdd4f29c6904993648ce873e83ef9cafe
diff --git a/libs/gui/BufferQueue.cpp b/libs/gui/BufferQueue.cpp
index f4214c7..20c4e3a 100644
--- a/libs/gui/BufferQueue.cpp
+++ b/libs/gui/BufferQueue.cpp
@@ -24,8 +24,8 @@
 #include <EGL/eglext.h>
 
 #include <gui/BufferQueue.h>
+#include <gui/ISurfaceComposer.h>
 #include <private/gui/ComposerService.h>
-#include <surfaceflinger/ISurfaceComposer.h>
 
 #include <utils/Log.h>
 #include <gui/SurfaceTexture.h>