glsl/builtins: Rework profiles to use the new '.glsl' common suffix.

glsl/builtins: Rework profiles to use the new '.glsl' common suffix.

Deletes a lot of pointless duplication, as well as some run-time effort.

Conveniently, GLSL 1.40 no longer needs a .vert variant, since it
doesn't define any built-ins specific to the vertex shader stage.

ARB_texture_rectangle and OES_EGL_image_external also only need a single
profile, since the .vert and .frag variants were identical.

I didn't bother with EXT_texture_array and OES_texture_3D because
they're so tiny that the savings would be miniscule.

Cuts the generated builtin_function.cpp from 1.7MB to 1.0MB (41%).

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Ian Romanick <ian.d.romanick@intel.com>