dri: set allow_higher_compat_version for Faster Than Light

Gurchetan Singh requested to merge gurchetansingh/mesa:FTL-fix into master

With 781a78 ("mesa: enable ARB_direct_state_access in compat for GL3.1+), it's possible to have DSA with GL3.1+.

FTL creates a GL3.1 compat context, but fails the _mesa_has_geometry_shaders(..) check in frame_buffer_texture.

Bump the compat version to pass the check.

CC: @mareko @tarceri

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