Update the Ubuntu host to get newer kernel
Update the Ubuntu host to get newer kernel

... because crun (used in newer fedora containers) calls statx(), which is
available since kernel 4.11, but Ubuntu Trusty only has 4.4. The glibc
emulation of statx() fails with EINVAL on unrecognized flags, which crun
does not recognize, so it does not fall back to older syscalls.

https://github.com/containers/crun/issues/189

Signed-off-by: Miloslav Trmač <9c008e38982a5397deb855345fb164f0558459ae@redhat.com>

containers/image,containers/image