Patch: Run init tests only when __cxa_atexit is supported.

[Mark Mitchell]

Steve Ellcey wrote:
> Here is an update of my change to XFAIL the init5, init18, and init19
> tests on systems that do not support __cxa_atexit.  init18 was also
> changed to use _exit instead of _Exit and to not run it on some
> platforms that don't support _exit.  That part of the change was OKed by
> Mark Mitchell but it wasn't clear to me if I had approval for the
> patch as a whole so I thought I would resend it now that I have changed
> it and retested it.
> 
> OK to checkin?

Yes, thanks.

-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
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