message: Adds comment on why pthread is required on native
diff: @@ -36,6 +36,7 @@ platform = native
  lib_extra_dirs =
  common/libs/
  common/test_libs/
  +; googletest requires pthread.
  build_flags = -Icommon/include/ -std=c++11 -DTEST_MODE -pthread
  lib_deps = googletest
  ; This is needed for the googletest lib_dep to work. I don't understand why.
  