Add metric comments for proc

[Martins Innus <minnus@xxxxxxxxxxx>]

Hi,

    No functionality changes, just comment labels for the metrics in 
proc for fetch and store.
https://github.com/ubccr/pcp/tree/hotproc_cleanups

Thanks

Martins

commit d8fa42ffabcc31b565a57f20037f90b328995add
Author: Martins Innus <minnus@xxxxxxxxxxx>
Date:   Wed May 6 15:20:22 2015 +0000

    Label the metrics in store/fetch in pmdas/linux_proc

 src/pmdas/linux_proc/pmda.c |  420 
+++++++++++++++++++++---------------------
 1 files changed, 210 insertions(+), 210 deletions(-)