Patch for kernel variants/flavors

[Harald Hoyer]

Here is a patch for the kernel.spec, which changes the version of kernel
flavor/variants to end in "-$flavor" instead of ".$flavor". This change makes it
easier to detect a flavor and a parser can separate it from the architecture.

With that change we can correct kernel-install (of systemd) to call
new-kernel-package with --package kernel-$flavor, because the $flavor can easily
be extracted from the version string.

Another solution would be to name the default kernel to have a flavor "default"
like SUSE does, but this does not look nice.

Another solution would be a hardcoded list of flavors in kernel-install.

The last solution would be to add a flavor argument to kernel-install, which has
no purpose other than to pass it through to new-kernel-package.