There already was a patch to use @executable_path (which is wrong, consider e.g.
when such libs are loaded into the URE uno executable), so fix it to use
@_..._OOO instead (and no need to set --prefix), and pass the resulting libs
through macosx-change-install-names.

Change-Id: I2eb1801b64de81ac2b2844f893c9149fc78c3aa9