examples.in: Replace kpatch with acpi-call as an example dkms package

Ubuntu doesn't build kpatch-dkms, so this makes the autopkgtest of autodep8 fail there.

There's a comment in the changelog of the latest kpatch upload in Ubuntu saying "kpatch-dkms will be deprecated in the upstream soon". I haven't verified that, but still we don't build it there. I just picked a random package which works in Debian and Ubuntu.