c++locale_internal.h: New header.

c++locale_internal.h: New header.

	* config/locale/generic/c++locale_internal.h: New header.
	* config/locale/gnu/c++locale_internal.h: New header.
	* config/locale/gnu/c_locale.cc: Include it.
	* config/locale/gnu/collate_members.cc: Include it.
	* config/locale/gnu/ctype_members.cc: Include it.
	* config/locale/gnu/messages_members.cc: Include it.
	* config/locale/gnu/monetary_members.cc: Include it.
	* config/locale/gnu/numeric_members.cc: Include it.
	* config/locale/gnu/time_members.cc: Include it.
	(_M_put): Reorder __strftime_l and __wcsftime_l arguments to match
	glibc.
	(_M_initialize_timepunct): Initialize _M_c_locale_timepunct for
	C locale.
	* acinclude.m4: Include string.h when testing strcoll_l.
	For glibc 2.3 provide __-prefixed prototypes.
	(CLOCALE_INTERNAL_H): Set, add AC_LINK_FILES line.
	* aclocal.m4, configure: Rebuilt.

	* include/bits/locale_facets.h: Add declaration of specialization
	here.
	* config/locale/gnu/messages_members.cc: Add specialization for
	messages<wchar_t>.
	* config/locale/gnu/messages_members.h: Remove generic definition
	of do_get.

From-SVN: r56837