automation: add timestamps to Xen tests

Enable Xen timestamps in the automated Xen tests, this is helpful in
order to figure out if Xen is stuck or just slow in the automated
tests.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wl@xen.org>
Release-acked-by: Juergen Gross <jgross@suse.com>

automation/scripts/qemu-smoke-x86-64.sh

@@ -24,7 +24,8 @@ set +e
 timeout -k 1 10 \
 qemu-system-x86_64 -nographic -kernel binaries/xen \
         -initrd xtf/tests/example/$k \
-        -append "loglvl=all com1=115200,,8n1 console=com1 noreboot $extra" \
+        -append "loglvl=all com1=115200,,8n1 console=com1 noreboot \
+                 console_timestamps=boot $extra" \
         -m 512 -monitor none -serial file:smoke.serial
 set -e
 grep -q 'Test result: SUCCESS' smoke.serial || exit 1