re PR libstdc++/61532 (make_signed and make_unsigned wchar_t have started failing in the libstdc++ testsuite.)

	PR libstdc++/61532
	* testsuite/20_util/make_signed/requirements/typedefs-1.cc: Do not
	apply the signed specifier to wchar_t.
	* testsuite/20_util/make_signed/requirements/typedefs-2.cc: Likewise.
	* testsuite/20_util/make_unsigned/requirements/typedefs-1.cc: Check
	cv-qualifier and size.
	* testsuite/20_util/make_unsigned/requirements/typedefs-2.cc:
	Likewise.

From-SVN: r211909