kvm tools: Don*t generate deps and version file on clean target

This is redundant since we're to remove them right after
being generated.

CC: Ingo Molnar <mingo@kernel.org>
CC: Pekka Enberg <penberg@kernel.org>
CC: Sasha Levin <sasha.levin@oracle.com>
CC: Asias He <asias@redhat.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>