`runApplication` takes an `args_out` parameter which, if non-null, is
supposed to be set to match unrecognized command-line args. However,
the parameter is never passed to `finalizeCommandLineOptions`, which
will therefore log an error and throw an exception if any command line
arguments are unrecognized.
This patch fixes the oversight, ensuring that `runApplication` will
correctly populate a non-null `args_out` parameter with unrecognized
command-line arguments, and not throw an exception in this case.
d8e4013c92