ckmake: add support for kernel ranges

ckmake: add support for kernel ranges

At times you may only want to test with ckmake a specific
kernel range or target kernels. You can do that now. ckmake
will use this list against what it finds on your system.

Examples:

  * ckmake --revs 3.3..3.4
  * ckmake --revs 2.6.24,2.6.30,2.6.32..3.2,3.4

The base kernels revisions is what is expected. The base kernel
revision of say 3.4.5 is 3.4, the base revision of say 2.6.24.2
is 2.6.24.

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>