Minor fixes to gtest_build_tests=ON

[puetzk]

trafficstars

Fix some failures identified in gtest_build_tests=ON when trying to build googletest with winegcc for a winelib application (i.e. when using a POSIX libc/libstdc++, but with some win32 API available).

Context: I have additional patches in the branch https://github.com/puetzk/googletest/commits/wine/, but I don't think their maturity (or popularity) makes sense to upstream at this time. But these two commits are stand-alone fixes that seem generally applicable, so I've cherry-picked them.

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