unix: fix deadlock in unix runmode on many cores

Same issue as in 7f8795c756, with the
solution now also applied to the unix socket runmode.

Bug #2734

src/runmode-unix-socket.c

@@ -575,6 +575,7 @@ static TmEcode UnixSocketPcapFilesCheck(void *data)
 
     /* Un-pause all the paused threads */
     TmThreadWaitOnThreadInit();
+    PacketPoolPostRunmodes();
     TmThreadContinueThreads();
 
     SCLogInfo("Starting run for '%s'", this->current_file->filename);