Pass neon option to assembler but not the compiler. Step 1 of unifying the two libraries back into one.

BUG=371
TESTED=local ios builds ignore the option, but still work.
R=brucedawson@google.com, harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/31719004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1145 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

@@ -1,6 +1,6 @@
 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1143
+Version: 1145
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1143
+#define LIBYUV_VERSION 1145
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

libyuv.gyp

@@ -57,7 +57,7 @@
             # arm64 does not need -mfpu=neon option as neon is not optional
             ['target_arch != "arm64"', {
               'cflags': [
-                '-mfpu=neon',
+                '-Wa,-mfpu=neon',
               ],
             }],
           ],