i965: Make FS uniforms be the actual type of the uniform at upload time.

i965: Make FS uniforms be the actual type of the uniform at upload time.

This fixes some insanity that would otherwise be required for GLSL
1.30 bit ops or gen6 integer uniform operations in general, at the
cost of upload-time pain.  Given that we only have that pain because
mesa's mangling our integer uniforms to be floats, this something that
should be fixed outside of the shader codegen.