glFinish to flush deletes

Bug: 17479800
Change-Id: I4d4a3eeda510e037f806052025184f3cde18c847
diff --git a/libs/hwui/Caches.cpp b/libs/hwui/Caches.cpp
index 9b0025f..f0bf7b2 100644
--- a/libs/hwui/Caches.cpp
+++ b/libs/hwui/Caches.cpp
@@ -377,6 +377,7 @@
     }
 
     clearGarbage();
+    glFinish();
 }
 
 ///////////////////////////////////////////////////////////////////////////////