message: Fix help output for --gen-includes
  Fixes the --help output documenting the deprecated --gen-includes
  option, in which the option name contained a typo (--gen-inclues).
diff: @@ -90,7 +90,7 @@ const static FlatCOption options[] = {
  "--no-prefix." },
  { "", "swift-implementation-only", "",
  "Adds a @_implementationOnly to swift imports" },
  - { "", "gen-inclues", "",
  + { "", "gen-includes", "",
  "(deprecated), this is the default behavior. If the original behavior is "
  "required (no include statements) use --no-includes." },
  { "", "no-includes", "",
  