Call AllowCommandLineReparsing in unit tests

Allows us to ignore flags passed on to us by Chromium build bots
without having to explicitly disable them. (Thanks pbos!)

TESTED=webrtc ran modules_unittests with a bogus flag did not result in an
error.

R=kjellander@chromium.org
BUG=libyuv:507

Review URL: https://codereview.chromium.org/1417573002 .

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 1514
+Version: 1515
 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 1514
+#define LIBYUV_VERSION 1515
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

unit_test/unit_test.cc

@@ -304,6 +304,9 @@ LibYUVBaseTest::LibYUVBaseTest() :
 
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
+  // AllowCommandLineParsing allows us to ignore flags passed on to us by
+  // Chromium build bots without having to explicitly disable them.
+  google::AllowCommandLineReparsing();
   google::ParseCommandLineFlags(&argc, &argv, true);
   return RUN_ALL_TESTS();
 }