also, inform developer about the long link time
#jira UE-69632 Multithreaded adds 8.5 minutes to Launch On
#rnx
#rb none
#ROBOMERGE-OWNER: ryan.vance
#ROBOMERGE-AUTHOR: nick.shin
#ROBOMERGE-SOURCE: CL 4925927 in //UE4/Release-4.22/... via CL 4925930
#ROBOMERGE-BOT: DEVVR (Main -> Dev-VR)
[CL 5017756 by nick shin in Dev-VR branch]