NonUFSDebugFiles were getting copied to the staging directory first, but did not respect the "DeployLowerCaseFilenames" setting, and were incorrectly determining the captalization of the Engine/Content directory. Copy them after we copy UFSFiles.
#rb Ben.Marsh
#ROBOMERGE-OWNER: robert.manuszewski
#ROBOMERGE-AUTHOR: joe.conley
#ROBOMERGE-SOURCE: CL 5235658 in //UE4/Release-4.22/... via CL 5235659
#ROBOMERGE-BOT: CORE (Main -> Dev-Core)
[CL 5283490 by joe conley in Dev-Core branch]