Draft: ci/rootfs: add libdrm also inside the rootfs
What does this MR do and why?
ci/rootfs: add libdrm also inside the rootfs
Fixes: 402330101009 ("ci: enable ci-deb-repo for libdrm 2.4.119 (and others in the future)")
Signed-off-by: David Heidelberg <david.heidelberg@collabora.com>