kola: Print qemu command line
kola: Print qemu command line

To help figure out why the qemu command fails.

Signed-off-by: Geoff Levand <c3918f39022407dee6a0056ceca9b1aa80e8e4ce@infradead.org>

dm0-/mantle,glevand/coreos--mantle,quantum/coreos-mantle,glevand/coreos--mantle,marineam/mantle,dm0-/mantle,marineam/mantle,quantum/coreos-mantle