LU-1595 build: allow longer component in summary

Allow a longer "component:" field in the commit summary message, up to
11 characters, for osd-ldiskfs.  This exceeded the 9-character limit.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: Id0ed056e9b9efef07b26efeb9e2f4f1e8d500c1e
Reviewed-on: http://review.whamcloud.com/4174


Tested-by: Hudson
Reviewed-by: Bruce Korb <bruce_korb@xyratex.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Yu Jian <yujian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>