* configure.ac: Fix ZIP and GCJH at configure time to absolute

        paths like we do for the compiler, as we use it in external/sax
        and it doesn't get MULTIBUILDTOP right when multilibing.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@97091 138bc75d-0d04-0410-961f-82ee72b054a4