CFT: Move unwinder to toplevel libgcc

[Rainer Orth]

Steve,

> It looks like this is caused by having two '#include "md-unwind-support.h"'
> lines in unwind-ia64.c.  If I remove the first one (mixed in with the other
> includes at the top of the file) and leave the second one then the file
> compiles.  I still get the warning about discarding the cast but I guess that
> is OK.  I have a bootstrap running on IA64 Linux and it looks good so far.
> I haven't had a chance to follow-up on IA64 HP-UX.

I added the first #include to provide the definitions of UNW_IVMS_MODE
and MD_UNW_COMPATIBLE_PERSONALITY_P, not realizing that there was
another one already.

I guess the default definition of the latter can be moved below the
second #include "md-unwind-support.h"?

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University