fix libgui header location

Change-Id: Iec71706cdd4f29c6904993648ce873e83ef9cafe
diff --git a/services/surfaceflinger/tests/screencap/screencap.cpp b/services/surfaceflinger/tests/screencap/screencap.cpp
index 6cf1504..53566e0 100644
--- a/services/surfaceflinger/tests/screencap/screencap.cpp
+++ b/services/surfaceflinger/tests/screencap/screencap.cpp
@@ -21,7 +21,7 @@
 #include <binder/IServiceManager.h>
 
 #include <binder/IMemory.h>
-#include <surfaceflinger/ISurfaceComposer.h>
+#include <gui/ISurfaceComposer.h>
 
 #include <SkImageEncoder.h>
 #include <SkBitmap.h>