compiler: Remove nir_gl_types.h
What does this MR do and why?
glsl: move glsl_get_gl_type into glsl/linker_util.h
glsl_get_gl_type only accessed in src/compiler/glsl files, do not expose it in libcompiler
cc @cmarcelo
Signed-off-by: Yonggang Luo luoyonggang@gmail.com