Add @(entry_point_only) for procedures

src/check_decl.cpp

@@ -908,6 +908,7 @@ gb_internal void check_proc_decl(CheckerContext *ctx, Entity *e, DeclInfo *d) {
 		break;
 	}
 
+	e->Procedure.entry_point_only = ac.entry_point_only;
 	e->Procedure.is_export = ac.is_export;
 	e->deprecated_message = ac.deprecated_message;
 	e->warning_message = ac.warning_message;