BUG: perf error on syscalls for powerpc64.

[Ian Munsie]

Excerpts from Sukadev Bhattiprolu's message of 2015-07-17 11:51:04 +1000:
> Are you seeing this on big-endian or little-endian system?
> 
> IIRC, I saw the opposite behavior on an LE system a few months ago.
> i.e. without 1028ccf5, 'perf listf|grep syscall' failed.
> 
> Applying 1028ccf5, seemed to fix it.

You could be on to something there - IIRC the ABI was changed for LE to
remove the dot symbols. Might be worth testing on both.

Cheers,
-Ian