largefiles: confirm existence of outgoing largefile entities in remote store Before this patch, "hg summary" and "hg outgoing" show and count up all largefiles changed/added in outgoing revisions, even though some of them are already uploaded into remote store. This patch confirms existence of outgoing largefile entities in remote store, to show and count up only really outgoing largefile entities at "hg summary" and "hg outgoing".