7059019: G1: add G1 support to the SA Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA. Reviewed-by: never, poonam, johnc

These are the Java-level sources for the Serviceability Agent (SA).

To build, type "gnumake all".

For usage documentation, please refer to ../doc/index.html.