Log Message:
google-glog: Option-ize building tests, because googletest is a very
heavy dependency and often brings in a new compiler too.

Surprisingly, this package builds just fine (if googletest is disabled)
with a C++98 default, so remove C++11 from USE_LANGUAGES (googletest
requires C++14 anyway).

XXX some of the tests fail, the tests were not hooked up to run before.