color unittest allow j420 error of 5 for arm

R=harryjin@google.com
BUG=libyuv:511

Review URL: https://codereview.chromium.org/1412683005 .

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1519
+Version: 1520
 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 1519
+#define LIBYUV_VERSION 1520
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

unit_test/color_test.cc

@@ -27,7 +27,7 @@ namespace libyuv {
 #define ERROR_G 1
 #define ERROR_B 3
 #define ERROR_FULL 6
-#define ERROR_J420 4
+#define ERROR_J420 5
 #else
 #define ERROR_R 1
 #define ERROR_G 1