mesa: Add _mesa_error_no_memory for logging out-of-memory messages

mesa: Add _mesa_error_no_memory for logging out-of-memory messages

This can be called from locations that don't have a context pointer
handy.  This patch also adds enough infrastructure so that the unit
tests for the GLSL compiler and the stand-alone compiler will build and
function.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>