Update GTEST_PROJECT_URL_ in internal/gtest-port.h

As repository moved to github. All urls need to be changed. There is
still plenty to do.

googletest/include/gtest/internal/gtest-port.h

@@ -287,7 +287,7 @@
 # define GTEST_FLAG_PREFIX_DASH_ "gtest-"
 # define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
 # define GTEST_NAME_ "Google Test"
-# define GTEST_PROJECT_URL_ "http://code.google.com/p/googletest/"
+# define GTEST_PROJECT_URL_ "https://github.com/google/googletest/"
 #endif  // !defined(GTEST_DEV_EMAIL_)
 
 #if !defined(GTEST_INIT_GOOGLE_TEST_NAME_)