(timeout): Increase the timeout 2 more seconds.

src/server/testsuite/config/unix.exp

@@ -42,7 +42,7 @@ if { $EFENCE == "yes" } {
 
 # Some of the machines we run the Xenofarm tests on are really, really
 # slow, so we have to increase the timeout.
-set timeout [expr {3 * $timeout}]
+set timeout [expr {3 * $timeout + 2}]
 
 # Set the timeout value to something small for quicker testing, if you
 # have a fast enough machine.