Don't compare symbol addresses directly

Don't compare symbol addresses directly

GCC 5 will fold symbol address comparison, assuming each symbol has a
different address, which leads to abort.  We should use separate
functions to compare symbol address.

	PR gold/18663
	* testsuite/Makefile.am (script_test_1_SOURCES): Set to
	script_test_1a.cc script_test_1b.cc.
	(script_test_11_r.o): Replace script_test_11.o with
	script_test_11a.o script_test_11b.o.
	(script_test_11.o): Removed.
	(script_test_11a.o): New.
	(script_test_11b.o): Likewise.
	* testsuite/Makefile.in: Regenerated.
	* testsuite/script_test_1.h: New file.
	* testsuite/script_test_1b.cc: Likewise.
	* testsuite/script_test_11.h: Likewise.
	* testsuite/script_test_11b.c: Likewise.
	* testsuite/script_test_1.cc: Renamed to ...
	* testsuite/script_test_1a.cc: This.
	Include "script_test_1.h".
	(main): Call check_int and check_ptr.
	* testsuite/script_test_11.c: Renamed to ...
	* testsuite/script_test_11a.c: This.
	Include "script_test_11.h".
	(main): Call ptr_equal.