For test commands, there can be arguments passed to the test binary like `-- --ignored` or `--
--test-threads=1`. For these cases to work properly, the `args` parameter needs to be added to the
end of the 'test' command.
While in theory this should work without `cross`, compiling `openssl` with the
`vendored` feature fails when we run `cargo build --target i686-unknown-linux-musl`.
This commit updates the tests to check that this works and also rewrites the
test script from Bash to Perl.
Co-authored-by: Dave Rolsky <autarch@urth.org>
