Added fix to compile virt tools (aka guestfs-tools)

[LeanVel]

Since Sep 2021 libguestfs has split its repo and moved the guestfs-tools to a temporary repository. More Info:

• https://listman.redhat.com/archives/libguestfs/2021-September/msg00153.html
• https://www.mail-archive.com/libguestfs@redhat.com/msg22408.html

[doomedraven]

nice, thanks