Match ld besides collect2 in gcov test

Match ld besides collect2 in gcov test

The regexp that checks that -lgcov is linked in when --coverage is
passed to the compiler driver requires the command line to match
'/collect2'.  Some of our targets don't match that, but they match /ld
or ${target_alias}-ld depending on the testing scenario, so I'd like
to tweak the test to match those as well.

for  gcc/testsuite/ChangeLog

	* gcc.misc-tests/options.exp: Match /ld and -ld besides
	/collect2.

From-SVN: r274557