AIX, Solaris 2.8 excess errors fails

[David Edelsohn]

>>>>> Jason Merrill writes:

Jason> I disagree; this is a known limitation, not a failure.  These are tests for
Jason> library functionality, so workarounds are fine.

Jason> It is what user programs need to do if they want to work on AIX...

	The library relies on COMDAT Weak functionality.  This patch
simply covers up that fact, so it no longer tests library functionality.
Systems that supports weak will pass.

David