8164383: jhsdb dumps core on Solaris 12 when loading dumped core
Summary: Add the required extra parameters to Plookup_by_addr() and proc_arg_grab() as per the change to libproc with Solaris 12.
Reviewed-by: dsamersoff, sspitsyn
Contributed-by: jini.george@oracle.com

8067194: Restructure hotspot/agent/src to conform the modular source layout
Summary: Move sources under jdk.hotspot.agent
Reviewed-by: ihse, erikj, jbachorik