fix for msan builds which set -DLIBYUV_DISABLE_X86=1

TBR=harryjin@google.com
BUG=libyuv:566

Review URL: https://codereview.chromium.org/1673313003 .

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1572
+Version: 1573
 License: BSD
 License File: LICENSE
 

include/libyuv/compare_row.h

@@ -36,7 +36,8 @@ extern "C" {
 #endif  // clang >= 3.4
 #endif  // __clang__
 
-#if defined(_M_IX86) && (defined(VISUALC_HAS_AVX2) || defined(CLANG_HAS_AVX2))
+#if !defined(LIBYUV_DISABLE_X86) && \
+    defined(_M_IX86) && (defined(VISUALC_HAS_AVX2) || defined(CLANG_HAS_AVX2))
 #define HAS_HASHDJB2_AVX2
 #endif
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 1572
+#define LIBYUV_VERSION 1573
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT