LU-6030 ldiskfs: support pdirop split for RHEL6.5

LU-6030 ldiskfs: support pdirop split for RHEL6.5

Lustre commit 953e97987426bcc43a74be5b14f3a71319b33825
which split the parallel directory patch into two parts
was not applied to the RHEL6.5 platform which now results
in a build failure. The simple fix is to add the new
patches into the RHEL6.5 ldiskfs series file.

Change-Id: I12c407ac00e5471945217656e4c7a203ef34e99c
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: http://review.whamcloud.com/15196
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Andreas Dilger <andreas.dilger@intel.com>