gbm/dri: Fix const confusion
gbm/dri: Fix const confusion

The driver name is no longer const, it's always allocated dynamically
one way or another.  Drop const from dri_screen_create_dri2
driver_name argument to avoid warning.

Signed-off-by: Kristian Høgsberg <ca9b5b1e27d4fa7f4ba6848bdd08ca52cfd6330c@bitplanet.net>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler