Link lib and man to the main Cellar location

The libraries for perl binding are installed to `/usr/local/Cellar/subversion17/1.7.10/usr/local/Cellar/subversion17/1.7.10/lib/`, so even if you add `/usr/local/Cellar/subversion17/1.7.10/Library/Perl/5.12/darwin-thread-multi-2level/` to perl search library, anything that uses the new perl bindings (like git svn) will fail because the libs are not in the right place.

This symlinks the lib and man pages to the right place.