LU-335 ldiskfs: SuSE 11 SP1 support for Lustre 2.X

LU-335 ldiskfs: SuSE 11 SP1 support for Lustre 2.X

Lustre 2.X has been lagging for SuSE server side support. This
work brings the code up to date to support the SuSE 11 SP1 kernel
2.6.32.36-0.5. To reduce the maintenance overhead we basically
add a patch that modifies the SuSE ext4 code to match very
closely to the RHEL6.1 ext4 code base.

Signed-off-by: James Simmons <uja.ornl@gmail.com>
Change-Id: I554679c9b0d400eeda1d5d30157c5d86e68793f9
Reviewed-on: http://review.whamcloud.com/575
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>