redhat/Makefile: Clean linux tarballs

Prarit Bhargavarequested to merge
prarit/kernel-ark:remove_linux_tar_xz into os-build

The dist-clean target should also clean up the tarballs created by the
scripts/create-tarball.sh script.

Signed-off-by: Prarit Bhargava prarit@redhat.com

Edited by Prarit Bhargava

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