Allow use of `cargo-xbuild` and tooling

Environment

• IntelliJ Rust plugin version: 0.2.105.2133-192
• Rust toolchain version: nightly-2019-09-05-x86_64-unknown-linux-gnu
• IDE name and version: Clion 2019.2.1
• Operating system: Arch-Linux 5.2.13-arch1-1-ARCH

Problem description

The plugin does not really allow to use xcheck and xclippy which are provided by the https://github.com/rust-osdev/cargo-xbuild crate, which is a simplified version of xargo. The plugin should allow to select xcheck and xclippy as the linter because the check and clippy tasks don’t work when using xbuild.

A cool extra idea which came to my mind was to also allow debugging with xrun if set up manually. For example, I’m launching via qemu which allows debugging, but somehow attaching doesn’t seem to correctly load the symbols. I however know that it is possible to use Clion to debug native code in qemu because I once did it with C++ and it worked perfectly. Maybe this can be somehow reflected by this plugin (of course I know this with qemu is a very specific case, however since this is gcc one might be able to generalize it).

[L3tum]

Being able to just switch compiler/command with xbuild/xcheck/xclippy would already be pretty good

[Undin]

Do you still need support for cargo-xbuild? It’s possible to build stdlib modules via cargo now. https://github.com/rust-osdev/cargo-xbuild#alternative-the-build-std-feature-of-cargo. Looks like it makes xbuild tool quite redundant