st/mesa: clean up #includes in st_draw.c
st/mesa: clean up #includes in st_draw.c

Reviewed-by: Tapani Pälli <cdcb67a5e49297de94340ca09f25994bd5e7f762@intel.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler