pkg_tar should provide includes / excludes glob filter options

The `pkg_tar` rule should provide glob filter options in order to perform file filtering transforms on existing tar files. My particular use case is stripping out files when creating a Debian package from an existing binary distribution package like test case files and some documentation in [go1.12.9.linux-amd64.tar.gz](https://dl.google.com/go/go1.12.9.linux-amd64.tar.gz) as an example.

Besides being useful for the rules in this package, it should also be useful in combination with [rules_docker](https://github.com/bazelbuild/rules_docker).