0.8.2 is the last version before the breaking "flags" keyword change.
For now, no_std crates need to be rlibs because rustc complains about
missing lang items on dylibs even though it would eventually be resolved
in the final link.
Ignore pub_use_of_private_extern_crate as there exists no version with
this fixed that uses the old API.
81ea9f2d2c