* libc/ctype/local.h (JP_JIS, JP_SJIS, JP_EUCJP): Move definition

	* libc/ctype/local.h (JP_JIS, JP_SJIS, JP_EUCJP): Move definition
	to jp2uc.c.
	(__jp2uc): Remove declaration.
	(_jp2uc): Declare.
	* libc/ctype/jp2uc.c (JP_JIS, JP_SJIS, JP_EUCJP): Define.
	(__jp2uc): Remove Cygwin special case.
	(_jp2uc): New function.  On Cygwin, just return c.
	* libc/ctype/iswalpha.c (iswalpha): Just call _jp2uc.
	* libc/ctype/iswblank.c (iswblank): Ditto.
	* libc/ctype/iswcntrl.c (iswcntrl): Ditto.
	* libc/ctype/iswprint.c (iswprint): Ditto.
	* libc/ctype/iswpunct.c (iswpunt): Ditto.
	* libc/ctype/iswspace.c (iswspace): Ditto.
	* libc/ctype/towlower.c (towlower): Ditto.
	* libc/ctype/towupper.c (towupper): Ditto.