Log Message:
Fix PLIST, configure really, issue when apr-util package has db4
option selected: subversion's configure script does not detect db4
support in apr-util hence ${PREFIX}/lib/libsvn_fs_base-1.* are not
built and installed.

So what's going on ? Well since devel/apr-util has db4 support with
DSO, apu-1-config does not report db4 libraries, flags, etc.
See https://bugs.launchpad.net/ubuntu/+source/apr-util/+bug/96980

The workaround is to give  the argument --with-berkeley-db=... to
subversion's configure script when apr-util package has db4 option
selected.  See
http://svn.collab.net/viewvc/svn?view=revision&revision=35017