Remove charset map files from repository, generate in first bootstrap

* admin/charsets/Makefile.in (${srcdir}/charsets.stamp): New.
(all): Create the stamp file.
(extraclean): Delete the stamp file.
* src/Makefile.in (lispintdir, charsets): New variables.
(${lispintdir}/cp51932.el, ${lispintdir}/eucjp-ms.el, ${charsets}):
New rules.
(emacs$(EXEEXT), temacs$(EXEEXT)): Depend on $charsets.
* lisp/international/cp51932.el, lisp/international/eucjp-ms.el:
* etc/charsets/*.map: Remove from repository.
; * admin/charsets/mapconv: Fix typo in output comment.
; * etc/charsets/README: Small update.
; * .gitignore: Update for charset changes.

admin/charsets/mapconv

@@ -47,7 +47,7 @@ AWK=${AWK:-awk}
 
 case "$3" in
     GLIBC*)
-	FILE="$BASE in localedate/charmaps of glibc";
+	FILE="$BASE in localedata/charmaps of glibc";
 	SOURCE="";;
     CZYBORRA)
 	BASE="$BASE.gz";