Use 64B alignment for RGB buffers

Change-Id: Ia36c1638abfae19d988b026f193e6cd281db040f
diff --git a/gralloc/gralloc.cpp b/gralloc/gralloc.cpp
index 83a2407..2c12bda 100644
--- a/gralloc/gralloc.cpp
+++ b/gralloc/gralloc.cpp
@@ -163,7 +163,7 @@
     }
 
     if (format != HAL_PIXEL_FORMAT_BLOB) {
-        bpr = ALIGN(w*bpp, 16);
+        bpr = ALIGN(w*bpp, 64);
         vstride = ALIGN(h, 16);
         if (vstride < h + 2)
             size = bpr * (h + 2);