RFR (S): 8008536: Add HotSpot support for printing class loader statistics for JMap

[Erik Helin]

Hi all,

this change is the first of three changes related to renaming the jmap
option permstat to clstats. The change has to be done as three separate
changes in order to not break any repositories:
1. Add support for the -clstats option to the SA agent
2. Change the tool jmap to use -clstats instead of -permstat
3. Remove the option -permstat from the SA agent

This CR represents the first step. Once this change has found its way 
into the tl forest, then step two can be applied. Once the result of 
step two is back in the hotspot-gc forest, then step three can be done.

Step 2 and 3 are also out for review.

Webrev:
http://cr.openjdk.java.net/~ehelin/8008536/webrev.00/

Bug:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8008536

Testing:
JPRT

Thanks,
Erik