Merge "libpng: optimize for speed on Arm platforms" am: f055ab3202

Change-Id: Ib619556849394024c840da842345af0e3ebe6184
diff --git a/Android.bp b/Android.bp
index 2e24922..3db18da 100644
--- a/Android.bp
+++ b/Android.bp
@@ -17,9 +17,11 @@
     arch: {
         arm: {
             srcs: ["arm/*"],
+            cflags: ["-O3"],
         },
         arm64: {
             srcs: ["arm/*",],
+            cflags: ["-O3"],
         },
         x86: {
             srcs: ["intel/*"],