Does not respect ~/.cargo/config.toml target-dir setting

[griccardos]

when doing a cargo bundle --release, it gives an error that it failed to copy binary /path/to/project/target/release/app.
That is because target-dir in the config.toml file is set to a different folder e.g. /tmp/rust so the correct path would be /tmp/rust/target/release/app
Additionally it should create the bundle directory in /tmp/rust/target/release/bundle