Add a test that indicates the compiler is able to generate avx2 code.

BUG=none
TESTED=out\release_x64\libyuv_unittest --gtest_filter=libyuvTest.TestCompilerHasAVX2
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/24439004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1074 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1069
+Version: 1074
 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 1069
+#define LIBYUV_VERSION 1074
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

unit_test/cpu_test.cc

@@ -51,6 +51,15 @@ TEST_F(libyuvTest, TestCpuHas) {
   printf("Has MIPS DSPR2 %x\n", has_mips_dspr2);
 }
 
+TEST_F(libyuvTest, TestCompilerHasAVX2) {
+#if defined(GCC_HAS_AVX2) || defined(CLANG_HAS_AVX2) || \
+    defined(VISUALC_HAS_AVX2)
+  printf("Has AVX2 1\n");
+#else
+  printf("Has AVX2 0\n");
+#endif
+}
+
 #if defined(__i386__) || defined(__x86_64__) || \
     defined(_M_IX86) || defined(_M_X64)
 TEST_F(libyuvTest, TestCpuId) {