Two things:
(a) Add the log filter to capture libvirt CPU manipulation driver
related error messages when things fallout (e.g. CPU model
comparision failures during live migration).
(b) While we're at it, remove the "1:qemu_monitor" log filter, because
the existing filter "1:qemu" should take care of logging the
interactions with QEMU monitor console. This is the case since
the introduction of VIR_LOG_INIT() macro in upstream libvirt,
which performs a substring match on a given file name. (Available
from libvirt version v1.2.10 onwards).
Change-Id: I75befd52d9f892eb5a6236eee9a397fab7602ecc