MacOSX support

[Andrew Haley]

Boehm, Hans writes:

 > Should I try to extract and check in the dl_iterate_phdr() fix
 > separately?  That's still somewhat risky, since the fix affects
 > several files.  But it fixes a serious bug in the 3.3 libgcj, which
 > I would really like to see fixed.

OK.

 > (Or is there a plan to change dl_iterate_phdr to avoid the lock?)
 > If we go this route, it would be nice if someone could check the
 > MacOSX fix in separately as well.

I don't think MacOSX gcj will be ready for 3.3.

Andrew.