Patch: add systemtap-style marker to _Unwind_DebugHook

[Richard Henderson]

On 01/14/2011 01:17 PM, Tom Tromey wrote:
> 	* unwind-dw2.c: Include sys/sdt.h if it exists.
> 	(_Unwind_DebugHook): Use STAP_PROBE2.
> 	* config.in, configure: Rebuild.
> 	* configure.ac: Check for sys/sdt.h.

Ok by me.


r~