intel/compiler: Add functions to get prog_data and prog_key sizes for a stage

v2:
 * Return unsigned instead of size_t. (Ken)

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/intel/compiler/brw_compiler.h

@@ -1109,6 +1109,12 @@ DEFINE_PROG_DATA_DOWNCAST(sf)
 struct brw_compiler *
 brw_compiler_create(void *mem_ctx, const struct gen_device_info *devinfo);
 
+unsigned
+brw_prog_data_size(gl_shader_stage stage);
+
+unsigned
+brw_prog_key_size(gl_shader_stage stage);
+
 /**
  * Compile a vertex shader.
  *