For GL tests (those built by CMakeLists.gl.txt), if USE_WAFFLE is enabled
then freeglut is replaced with glut_waffle.

For GLES1 and GLES2 tests, glut_waffle is now required.
Reviewed-by: Pauli Nieminen <pauli.nieminen@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Signed-off-by: Chad Versace <chad.versace@linux.intel.com>