fix libgui header location

Change-Id: Iec71706cdd4f29c6904993648ce873e83ef9cafe
diff --git a/libs/gui/IGraphicBufferAlloc.cpp b/libs/gui/IGraphicBufferAlloc.cpp
index 30f8d00..a70a5e8 100644
--- a/libs/gui/IGraphicBufferAlloc.cpp
+++ b/libs/gui/IGraphicBufferAlloc.cpp
@@ -24,7 +24,7 @@
 
 #include <ui/GraphicBuffer.h>
 
-#include <surfaceflinger/IGraphicBufferAlloc.h>
+#include <gui/IGraphicBufferAlloc.h>
 
 // ---------------------------------------------------------------------------