[Linux] Start TBB anyway when the launcher script is run with invalid args
[Linux] Start TBB anyway when the launcher script is run with invalid args

Suggested by velope, because the most likely cause of oddball
command-line arguments is that someone dragged-and-dropped one or more
files on the start-tor-browser icon using a GUI file manager.
(cherry picked from commit fa3a87a1837b30590f20918c41904e264816bd0e)

Shondoit/torbrowser,Shondoit/torbrowser,Shondoit/torbrowser,Shondoit/torbrowser