re PR libstdc++/60958 (Initialization of arrays in tr1/regex ill-formed or with undefined behaviour)

	PR libstdc++/60958
	* include/tr1/regex (regex_traits::isctype): Comment out broken code.
	* testsuite/util/testsuite_regex.h (regex_match_debug): Improve
	comment.

From-SVN: r209807