Incomplete cargo build options

[Lilith]

Cargo supports a lot more build options that wasm-build should also support. This should just be a matter of piping them through.

[Lilith]

It supports most of them now.

These ones I don't know how to handle:

    --example NAME               Build only the specified example
    --examples                   Build all examples
    --test NAME                  Build only the specified test target
    --tests                      Build all tests
    --bench NAME                 Build only the specified bench target
    --benches                    Build all benches
    --color WHEN                 Coloring: auto, always, never

These ones need to be forced to wasm32-unknown-unknown and json.

    --target TRIPLE              Build for the target triple
    --message-format FMT         Error format: human, json [default: human]