* If a single line was larger than 32kb, the process would be treated as having terminated.
* If the last output line did not have a trailing newline, the line would be dropped.
#rb none
#jira UE-64234
#ROBOMERGE-SOURCE: CL 4403074 in //UE4/Release-4.21/...
#ROBOMERGE-BOT: RELEASE (Release-4.21 -> Release-Staging-4.21)
[CL 4403075 by ben marsh in Staging-4.21 branch]
6b4551bbdf