PATCH: IA64 HP-UX C++ failures (_Unwind_GetIPInfo)

[Andrew Pinski]

> 
> The recent addition of _Unwind_GetIPInfo to the GCC unwind library broke
> C++ on IA64 HP-UX because C++ on IA64 HP-UX uses the system unwind
> library and that library does not include _Unwind_GetIPInfo.  This patch
> creates a new file, unwind-hpux.c, to define _Unwind_GetIPInfo and adds
> it to the IA64 HP-UX libgcc build.
> 
> Tested on IA64 HP-UX with no regressions.
> 
> OK for checkin?

Isn't this also needed for ia64-linux-gnu when using the ia64-undwinder?

-- Pinski