kernel-install plugin scripts are outdated

Dracut hasn't had a release since December, but since then there's been some activity on the kernel-install hooks that are placed in /usr/lib/kernel/install.d. In particular, this commit would be useful: http://github.com/dracutdevs/dracut/commit/166456331d55cdc23946c11315dc2c88aab15911

Currently, if I configure kernel-install to generate a UKI (by adding layout=uki && uki_generator=ukify to /etc/kernel/install.conf), then dracut will run but place the generated initramfs in the wrong place. Consequently, the 60-ukify.install hook that runs will not see the initramfs, and generate a UKI that has no initrd.

Could we backport the fixes to 50-dracut.install for the time being?