Move _PathLocale to data-only file, so setrunelocale() not pick up

whole setlocale.c module now.

Should go into 2.2

lib/libc/locale/setlocale.c

@@ -98,8 +98,6 @@ extern int __time_load_locale __P((const char *)); /* strftime.c */
 extern int _xpg4_setrunelocale __P((char *));
 #endif
 
-char	*_PathLocale;
-
 char *
 setlocale(category, locale)
 	int category;

lib/libc/locale/table.c

@@ -193,3 +193,5 @@ _RuneLocale _DefaultRuneLocale = {
 _RuneLocale *_CurrentRuneLocale = &_DefaultRuneLocale;
 
 int __mb_cur_max = 1;
+
+char	*_PathLocale;