When a library is installed, dependent on a convenience library, and it
involves relinking, the object files extracted from the convenience
library are not removed after the relink. This is a problem if you build
as non-root, install as root, then try to remove the build directory as
non-root; Clean up properly if relink fails; Change"$realname"U to
${realname}T to be consistent.
Missing backport of 2004-03-24 patch reported against MirLibtool
by Marc Matteo <marcm@lectroid.net>.