zlib and boehm-gc did not properly support multilibs

[Tom Tromey]

>>>>> "Alexandre" == Alexandre Oliva <oliva@dcc.unicamp.br> writes:

Alexandre> Now that alpha is multilibbed on -mieee, we need *working*
Alexandre> multilib support in all libgcj target libraries.  Here's a
Alexandre> patch:

Thanks.  I've put this on the branch and the trunk.

T