gdb/linux-record fixes

[Pedro Alves]

Hi Marcin,

Thanks for working on this.

On 10/17/2015 10:41 PM, Marcin Kościelnicki wrote:
> When working on process record and replay support for s390-linux,
> I found quite a few problems in syscall handling.  I fixed the most
> important of these in this patchset.  Please review.

I'm assuming none of the bugs you're fixing are presently covered by the
reverse debugging testsuite (testsuite/gdb.reverse/)?  E.g,. sounds like a
test that steps forward over pipe/time/waitpid calls and then backwards
would exercise patch #06?

Thanks,
Pedro Alves