Make folder for batches

BUG=skia:

Review URL: https://codereview.chromium.org/1277233002
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 9f83fed..9337a95 100755
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -9,7 +9,6 @@
 #include "GrContext.h"
 
 #include "GrAARectRenderer.h"
-#include "GrBatch.h"
 #include "GrBatchFontCache.h"
 #include "GrBatchTarget.h"
 #include "GrBatchTest.h"
@@ -48,6 +47,8 @@
 #include "SkTLS.h"
 #include "SkTraceEvent.h"
 
+#include "batches/GrBatch.h"
+
 #include "effects/GrConfigConversionEffect.h"
 #include "effects/GrDashingEffect.h"
 #include "effects/GrSingleTextureEffect.h"