Merge "zlib: Enable -O3 flag on whole Zlib." am: 7519555ee6

Original change: https://android-review.googlesource.com/c/platform/external/zlib/+/1705150

Change-Id: Ia7b7f017a1d9b6d75184c5071d3089a6e4a4044c
diff --git a/Android.bp b/Android.bp
index ae055c0..6c8c37c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -108,6 +108,8 @@
         "-DHAVE_HIDDEN",
         // We do support const, so turn that on.
         "-DZLIB_CONST",
+        // Enable -O3 as per chromium.
+        "-O3",
         "-Wall",
         "-Werror",
         "-Wno-unused",
@@ -204,6 +206,8 @@
         "-DHAVE_HIDDEN",
         // We do support const, so turn that on.
         "-DZLIB_CONST",
+        // Enable -O3 as per chromium
+        "-O3",
         "-Wall",
         "-Werror",
         "-Wno-unused",