Mesa: tag allow-3.2-override-v1: Fix issue with overriding GL to 3.2 and GLSL to 1.50

[Carl Worth]

Module: Mesa
Branch: refs/tags/allow-3.2-override-v1
Tag:    03aa2fcfa0184e3808e9444a8b54154d540ab508
URL:    http://cgit.freedesktop.org/mesa/mesa/tag/?id=03aa2fcfa0184e3808e9444a8b54154d540ab508

Tagger: Jordan Justen <jordan.l.justen at intel.com>
Date:   Fri Feb 22 11:20:48 2013 -0800

Fix issue with overriding GL to 3.2 and GLSL to 1.50

Using MESA_GL_VERSION_OVERRIDE=3.2 and
MESA_GLSL_VERSION_OVERRIDE=150 currently fails with piglit's
shader_runner. For a GLSL 1.50 test, shader_runner wants to
create a 3.2 core profile for a 1.50 test, but that was not
working. Also, the compiler would assert during initialization
if the version override was 1.50.