support multiple args in scripts

allows `delocate-wheel *.whl`, etc.
test scripts with multiple args
Merge remote-tracking branch 'minrk/multi-arg'

* minrk/multi-arg:
  test scripts with multiple args
  support multiple args in scripts
NF: list-deps default filter of system libraries

By default, filter system libraries from list-deps script output.
TST: test listdeps script on wheel and wheels
RF: return set of copied libraries from path mods

Return copied libraries from `delocate_path`, `delocate_wheel` and
`copy_recurse`.