ctype support for libstdc++ on VxWorks

ctype support for libstdc++ on VxWorks

for  libstdc++-v3/ChangeLog

	* acinclude.m4: Add VxWorks-specific case for the
	configuration of ctypes.
	* configure: Regenerate.
	* config/locale/vxworks/ctype_members.cc: Add VxWorks-specific
	version.
	* config/os/vxworks/ctype_base.h: Adjust for VxWorks7+.
	* config/os/vxworks/ctype_configure_char.cc: Likewise.
	* config/os/vxworks/ctype_inline.h: Likewise.
	* testsuite/28_regex/traits/char/isctype.cc: Defines
	NEWLINE_IN_CLASS_BLANK if the target is VxWorks.
	* testsuite/28_regex/traits/wchar_t/isctype.cc: Likewise.