re PR libstdc++/63199 (Inserting std::wregex to std::vector loses some std::wregex...

re PR libstdc++/63199 (Inserting std::wregex to std::vector loses some std::wregex values)

	PR libstdc++/63199
	* include/bits/regex.h (basic_regex::basic_regex, basic_regex::assign,
	basic_regex::imbue, basic_regex::getloc, basic_regex::swap): Add
	_M_loc for basic_regex.
	* include/bits/regex_automaton.h: Add _M_traits for _NFA.
	* include/bits/regex_compiler.h (_Compiler::_M_get_nfa, __compile_nfa):
	Make _Compiler::_M_nfa heap allocated.
	* include/bits/regex_compiler.tcc (_Compiler::_Compiler): Make
	_Compiler::_M_nfa heap allocated.
	* include/bits/regex_executor.h (_Executor::_M_is_word):
	Fix accessing _M_traits.
	* include/bits/regex_executor.tcc (_Executor::_M_dfs):
	Fix accessing _M_traits.
	* testsuite/28_regex/algorithms/regex_match/ecma/wchar_t/63199.cc:
	New testcase.

From-SVN: r215578