Merge branch 'master' into win-libcxx

googletest/include/gtest/gtest.h

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

googletest/src/gtest.cc

googletest/test/gtest_color_test.py

googletest/test/gtest_filter_unittest.py

googletest/test/gtest_output_test.py

googletest/test/gtest_repeat_test.cc

googletest/test/gtest_test_utils.py

googletest/test/gtest_throw_on_failure_test.py

googletest/test/gtest_uninitialized_test.py

googletest/test/gtest_uninitialized_test_.cc

googletest/test/gtest_unittest.cc

googletest/test/gtest_xml_outfiles_test.py

googletest/test/gtest_xml_output_unittest.py

googletest/test/gtest_xml_test_utils.py