agent: added win8 and win2012 to reported os version.
agent: added win8 and win2012 to reported os version.

Change-Id: I80d2fdce98479f0d2ecf693c08bb84aff44c4465
Signed-off-by: Gal Hammer <f3e7ccc4d8a16b649e8a47f15e5bba3a4f8a2bd0@redhat.com>

oVirt/ovirt-guest-agent,edwardbadboy/ovirtagent-ubuntu,edwardbadboy/ovirtagent-ubuntu,edwardbadboy/ovirtagent-ubuntu,oVirt/ovirt-guest-agent,oVirt/ovirt-guest-agent,silenceli/oga-windows,edwardbadboy/ovirtagent-ubuntu,silenceli/oga-windows,oVirt/ovirt-guest-agent,silenceli/oga-windows,silenceli/oga-windows