gold: Discard .note.gnu.property section

Discard .note.gnu.property section since it changes the expected section
order.

	PR gold/23503
	* testsuite/Makefile.am (justsyms_lib): Pass
	-T $(srcdir)/justsyms_lib.t to gold.
	* testsuite/Makefile.in: Regenerated.
	* testsuite/justsyms_lib.t: New file.
	* testsuite/script_test_10.t: Discard .note.gnu.property section.