Skip local error_mark_node decls

There is no need to finalize local error_mark_node decls.

gcc/

	PR target/66810
	* cgraphbuild.c (pass_build_cgraph_edges::execute): Skip local
	error_mark_node decls.

gcc/testsuite/

	PR target/66810
	* gcc.target/i386/pr66810.c: New test.

From-SVN: r229083