修改合成方式爲gpu合成

diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index ec5d7d5..da3ca68 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -154,7 +154,7 @@ SurfaceFlinger::SurfaceFlinger()
         mAnimCompositionPending(false),
         mDebugRegion(0),
         mDebugDDMS(0),
-        mDebugDisableHWC(0),
+        mDebugDisableHWC(1),
         mDebugDisableTransformHint(0),
         mDebugInSwapBuffers(0),
         mLastSwapBufferTime(0),