Rewrite /c/gcdev/ to $GLOBAL_DIR in targeted libtool archives.

* Ensures all directly-linked libtool archives in "dependency_libs" are
linked from the right directory
* Reduces the number of "appears to have been moved" warnings.
Add libtiff and libjpeg to the collection of precompiled packages

We were using precompiled packages of these before from the Gnome binary
collection, but that libtiff had an obsolete link request to
libjpeg-uchar-boolean-8.dll. These editions are compiled from the latest
sources and should avoid the bad rpath.