If we notice early enough that OpenGL is broken or not good enough, we
can disable it and terminate with EXITHELPER_NORMAL_RESTART. Not
beautiful, but works.

The earlier added check whether shader compilation and loading of
shader program binaries from a cached file works is now just one of
the aspects that are checked.

Change-Id: I9382576cc607f1916f6002f1fa78a62e23180fe3