The launcher did not support any help switches, yet it did have a help
message which was output when no switches were supplied. Add a quick
--help switch and -h shorthand to make the launcher a bit friendlier
and safer to probe.
Change-Id: I6a6acfbaafc176894fbf4cbeb51452ea8018cf86
(cherry picked from commit 4b385d884d)
e4b1da282f