* tm.texi: Document new target switch, NO_BUILTIN_WCHAR_TYPE.
	* cppinit.c (builtin_array): Define __WCHAR_TYPE__ only if
	NO_BUILTIN_WCHAR_TYPE is not defined.
	(CPP_WCHAR_TYPE): Delete.
	* cccp.c (main): Don't change wchar_type if cplusplus.
	(special_symbol, initialize_builtins): Honor NO_BUILTIN_WCHAR_TYPE.

From-SVN: r32241