patches/apr-abi: look for the correct library filenames to dynamically
load. This never mattered until now because we aren't building svn_ra
and svn_fs modules in a runtime-loadable fashion, but now we _are_
building the gnome-keyring library that way.
I'd still like to move all these non-public libraries, including the
swig stubs, to /usr/lib/svn. They really don't need to be in /usr/lib.