Log Message:
Updated google-glog to 0.3.4.

google-glog 0.3.4

    repository moved from code.google.com/p/google-glog to github.com/google/glog
    fixes for latest MSVS
    add libc++ support
    fix build issue in demangle.cc
    add callback for OpenObjectFileContainingPcAndGetStartAddress
    add StrError and replace posix_strerror_r call
    fix VC build by adding GOOGLE_GLOG_DLL_DECL
    style fix for C++11
    reduce dynamic allocation from 3 to 1 per log message
    attempt to improve mingw-w64 support
    support unordered_(map|set) by stl_logging