autobuild[sn-devel-104]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-104) has detected an intermittent failing test in 
the current master tree.

The autobuild log of the failure is available here:

   http://git.samba.org/autobuild.flakey.sn-devel-104/2016-08-16-2218/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-104/2016-08-16-2218/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-104/2016-08-16-2218/samba.stdout
  
The top commit at the time of the failure was:

commit 5066a6db4b53d9ab8986a36489328a4e9f7f92e7
Author: Stefan Metzmacher <metze at samba.org>
Date:   Fri Aug 12 12:15:46 2016 +0200

    s3:lib/pthreadpool: fix the build on older systems
    
    Some systems required an explicit <signal.h>, which comes
    via "system/wait.h"
    
    Signed-off-by: Stefan Metzmacher <metze at samba.org>
    Reviewed-by: Volker Lendecke <vl at samba.org>
    
    Autobuild-User(master): Stefan Metzmacher <metze at samba.org>
    Autobuild-Date(master): Tue Aug 16 19:09:55 CEST 2016 on sn-devel-144