Change instdso.sh to use libtool --install everywhere and then

Change instdso.sh to use libtool --install everywhere and then
clean up some stray files and symlinks that libtool leaves around
on some platforms.  This gets subversion building properly since
it needed a re-link to be performed by libtool at install time,
and the old instdso.sh logic to simply cp the DSO didn't handle
that requirement.

Submitted by: Sander Striker
Reviewed by:  Jeff Trawick

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94709 13f79535-47bb-0310-9956-ffa450edef68