glsl: add param to force shader recompile

This will be used to skip checking the cache and force a recompile.

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>

src/compiler/glsl/program.h

@@ -33,7 +33,7 @@ struct gl_shader_program;
 
 extern void
 _mesa_glsl_compile_shader(struct gl_context *ctx, struct gl_shader *shader,
-			  bool dump_ast, bool dump_hir);
+			  bool dump_ast, bool dump_hir, bool force_recompile);
 
 #ifdef __cplusplus
 } /* extern "C" */