[Libguestfs] [PATCH] v2v: Use OVMF secure boot file (RHBZ#1367615).

[Richard W.M. Jones]

This is only lightly tested.  In particularly I only tested that the
non-secure-boot path still works.  I didn't test it on RHEL 7.3 yet
because I haven't got enough free disk space for these giant source
*.ova files :-(  Will try to give that a go later.

Rich.