gas 2.10.91 from 20000920 cvs is broken under hpux 10.20

[Alan Modra]

On Sat, 23 Sep 2000, John David Anglin wrote:

> Look's like it fixes the problem, although I can't do a complete test now.

Thanks.  I'll commit the change, which goes back to the old SOM handling
for external and weak syms, on the strength of your say-so.  Incidentally,
dhd's original patch was surrounded with #ifdef OBJ_ELF, but I changed
it...

Alan Modra
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