Scripts like kvm-check-branches.sh group runs under a single directory
in resdir in order to allow easier retrospective analysis. However, they
do this by letting kvm.sh create a directory as usual and then moving it
after the run. This can be very confusing when looking at the results
while kvm-check-branches.sh is running. This commit therefore enables
--datestamp to hand subdirectories to kvm.sh.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
bc40735870