drirc: add force_glsl_version=440 for The Culling

drirc: add force_glsl_version=440 for The Culling

This game uses GLSL 430 but the interpolation qualifiers in
some shaders don't match, which ends up in a link error. GLSL
440 spec removed this restriction, force it.

This fixes the following link error, as well as serious
rendering problems.

error: vertex shader output `out_TEXCOORD1' specifies noperspective
interpolation qualifier, but fragment shader input specifies no
interpolation qualifier

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>