Changes

Bug 582305 Improve Leak Suspects report for references in paths

Fix command printing for commands such as:
path2gc 0x0 -exclude;
where the -exclude was omitted leading to default values being used
next time.
Use excludes on path2gc root for single object leak to find involved
thread.

Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=582305
Change-Id: I6f56548a6be6e0dc34e4536b6a563c729bf9b9f6