for ios enable neon for arm but not ia32 which is simulator.

BUG=308
TESTED=try bots
R=noahric@google.com

Review URL: https://webrtc-codereview.appspot.com/8059004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@979 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 978
+Version: 979
 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 978
+#define LIBYUV_VERSION 979
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

libyuv.gyp

@@ -14,7 +14,7 @@
     'use_system_libjpeg%': 0,
     'build_neon': 0,
     'conditions': [
-       ['OS == "ios" or (target_arch == "arm" and arm_version >= 7 and (arm_neon == 1 or arm_neon_optional == 1))', {
+       [ '(target_arch == "armv7" or target_arch == "armv8" or (target_arch == "arm" and arm_version >= 7)) and (arm_neon == 1 or arm_neon_optional == 1)', {
          'build_neon': 1,
        }],
     ],