Log Message:
Update libtool to 1.5.22.  Too many changes for CVS commit logs; here's
some highlighted changes:

* Fixes minor /tmp race condition bug.
* Integrated Interix support; no longer requires pkgsrc hackery.
* shlibtool is a wrapper using the (now working) "--tag=disable-static".
* Several other bugs fixed, removing some pkgsrc-local changes.