lsof sb does not extract source tarball

[roarde]

A source package is successfully retrieved and extracted, but the source itself is still ensconced in one of its extracted files: a tar archive. Build logs show errors were thrown at the most recent build, but they didn't cause the build to exit.

[roarde]

Addresses issue #165

lsof add extraction of tarballed tarball to fix build

→ <<cset b19160cb0f64>>