6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. Summary: Ensure a full GC that clears SoftReferences before throwing an out-of-memory Reviewed-by: ysr, jcoomes

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.