Log Message:
Update misc/py-anita to 1.38.  Changes from 1.37:

Deal with the sysinst message changes of 2015-04-30.

When halting the VM, don't quit as soon as the text "halted" is seen,
because it may be part the message "halted by root", which is printed
before disks have been synced.  Instead look for "The operating system
has halted", EOF, or a timeout.