Commits
Connor Wakamo committed 0d3369be030
[frontend] Add support for -help and --help-hidden. Added PrintHelp and PrintHelpHidden to FrontendOptions. Marked both -help and --help-hidden with the FrontendOption flag. Updated ParseFrontendArgs to parse -help and --help-hidden. Updated frontend_main() so that it prints the help for the frontend options. Swift SVN r11320