Auto merge of #1126 - akiss77:pr-test_cargo_compile, r=alexcrichton

For two tests, the `Cargo.toml`s and the `cfg`s don't match. E.g., the first test expects a successful build on all linux platforms but its `toml` is prepared for Intel linuxes only. The second test is very similar.

Here, the `cfg`s are amended to match the `toml`s.