Commit 93e9eb68 added fdc-test,
but accidentally removed rtc-test because check-qtest-i386-y was
not enhanced but set twice.

This patch adds rtc-test again (and sorts both tests alphabetically).
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>