Fix broken Info file produced by texinfo 4.11
http://bugs.gentoo.org/249167

--- gettext-0.17/gettext-tools/doc/gettext.info
+++ gettext-0.17/gettext-tools/doc/gettext.info
@@ -1,7 +1,8 @@
+This is gettext.info, produced by makeinfo version 4.13 from
+gettext.texi.
+
 INFO-DIR-SECTION GNU Gettext Utilities
 START-INFO-DIR-ENTRY
-This is gettext.info, produced by makeinfo version 4.11 from gettext.texi.
-
 * gettext: (gettext).                          GNU gettext utilities.
 * autopoint: (gettext)autopoint Invocation.    Copy gettext infrastructure.
 * envsubst: (gettext)envsubst Invocation.      Expand environment variables.