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-104/2016-03-30-1210/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-104/2016-03-30-1210/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-104/2016-03-30-1210/samba.stdout
  
The top commit at the time of the failure was:

commit a7a77e2f43a5baa00e104037b20487f28aabe866
Author: Ralph Boehme <slow at samba.org>
Date:   Sat Mar 26 12:43:55 2016 +0100

    tdb: avoid a race condition when checking for robust mutexes
    
    This fixes a race between calling waitpid() in two places (SIGCHLD the
    signal handler and the rendezvous code when waiting for the child to
    terminate), by
    
    - blocking SIGCHLD before installing our signal handler
    
    - in the rendezvous code call sigssuspend() which unblocks SIGCHLD and
      suspends the thread and waits for signal delivery
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=11808
    
    Signed-off-by: Ralph Boehme <slow at samba.org>
    Reviewed-by: Uri Simchoni <uri at samba.org>
    
    Autobuild-User(master): Ralph Böhme <slow at samba.org>
    Autobuild-Date(master): Tue Mar 29 16:04:19 CEST 2016 on sn-devel-144