mkpart.sh: Not being able to call clear is not a fatal error.
mkpart.sh: Pipe output to /dev/kmsg

Especially in autotest context, it can be useful to have access to
logs in /dev/pstore.
test/test-mkpart.sh: non-autotest mkpart test

This should be rewritten as a server-side test in autotest.
This test is simpler: it locks the machines, runs the partition
tests, then unlocks them.