Add a canned weston.ini template and install it with the
appropriate guest VM app ids as weston-ini-conf-kvm.
The guest VM images/ids can be overriden with the variables
GUEST_VM1_IMAGE and GUEST_VM2_IMAGE (from e.g. site.conf).
Bug-AGL: SPEC-4618
Change-Id: I053a956fd5af78b13095f15b6e6c40e81a0ff0c9 Signed-off-by: Scott Murray <scott.murray@konsulko.com>