Replace ASM_OUTPUT_LABEL with fprintf so that internal labels in property
note section are unchanged by -fleading-underscore.

gcc/

	PR target/85404
	* config/i386/cet.c (file_end_indicate_exec_stack_and_cet):
	Replace ASM_OUTPUT_LABEL with fprintf.

gcc/testsuite/

	PR target/85404
	* gcc.target/i386/pr85404.c: New test.

From-SVN: r259498