Upgrades Glog from 0.3.5 to 0.4.0, and Gtest from 0.8.0 to 0.10.0. Hopefully this will solve compilation error on MSVC with C++17.
This commit updates: - gflags 2.2.0 -> 2.2.1 - glog 0.3.4 -> 0.3.4 - gmock 1.7.0 -> 1.8.0 - gtest 1.7.0 -> 1.8.0