glsl: Parse "#version 150 core" directives.

Previously we only supported "#version 150".  This patch recognizes
"compatibility" to give the user a more descriptive error message.

Fixes Piglit's version-150-core-profile test.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
1 file changed