testsuite: Fix up two testcases [PR95008]

testsuite: Fix up two testcases [PR95008]

two-types-6.c never emitted the warning, even in 4.5/4.6, and pr93382.c
doesn't have properly escaped parens, so doesn't check whether they are
literally present in the message.

2020-05-09  Jakub Jelinek  <jakub@redhat.com>

	PR testsuite/95008
	* gcc.dg/two-types-6.c: Remove dg-warning directive that never
	triggered.
	* gcc.dg/analyzer/pr93382.c: Properly escape ()s in the diagnostic
	message.