[pcp] pcp updates

[Mark Goodwin]

Changes committed to git://oss.sgi.com/pcp/pcp.git dev

commit 8e1e29418fbbbfed956de7db27c6ae289beb8196
Author: Mark Goodwin <mgoodwin at redhat.com>
Date:   Fri Sep 23 11:37:37 2011 +1000

     Updated for hinv.ndisk fix
     modified:   CHANGELOG

commit fbc8cb817fa06bf892ebc34ddc16d381d49ecf0a
Author: Mark Goodwin <mgoodwin at redhat.com>
Date:   Fri Sep 23 11:21:43 2011 +1000

     Ensure CLUSTER_PARTITIONS is refreshed prior to fetching hinv.ndisk.

     modified:   src/pmdas/linux/proc_partitions.c