title: Is there way to use xbuild instead of build when calling cargo-binutils commands?
body: <p>I try to use binutils commands for binary of custom build target with <code>cargo xbuild</code> command.<br>
  However, I get an error like below message.</p>
  
  <pre><code>$ cargo nm --target i586-rust_dos.json --bin rust_dos --verbose
  "cargo" "build" "--target" "i586-rust_dos.json" "--bin" "rust_dos" "--message-format=json"
     Compiling rust_dos v0.1.0 (/home/soya/Documents/src/rust/prac/rust_dos)
  error[E0463]: can't find crate for `core`                                ] 0/2
    |
    = note: the `i586-rust_dos-8410465322435951119` target may not be installed
  
  error: aborting due to previous error
  
  For more information about this error, try `rustc --explain E0463`.
  error: could not compile `rust_dos`.
  
  To learn more, run the command again with --verbose.
  error: Failed to parse crate metadata
  
  </code></pre>
  
  <p>I realized that <code>cargo nm</code> uses <code>cargo build</code> command,<br>
  so I think this error should be solved if I make <code>cargo nm</code> to use <code>cargo xbuild</code> instead of <code>cargo build</code>.</p>
  
  <p>However, I cannot find how to do that.<br>
  Please teach me if there is a way.</p>