LU-20 build: fix confirmpatches, remove old patches

Update both confirmpatches.sh and clearpatches.sh scripts to take
a command line argument of the patch directory to check.  Add
options "-h" for help, and "-v" for verbose.

Update confirmpatches.sh to ignore comment lines in patch series.

Update clearpatches.sh to have a "-d" option to delete the patches
it found to be unused.

Remove unused kernel/ldiskfs patches found from running clearpatches.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: Id5a1de13930f1c428a13d6816e68db40ce61cab0
Reviewed-on: http://review.whamcloud.com/4755


Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Christopher J. Morrone <chris.morrone.llnl@gmail.com>
Reviewed-by: Yang Sheng <yang.sheng@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>