Add "slop" when anchor build

[Arrowana]

#642

https://github.com/clap-rs/clap/blob/44ae55fa4e33a2952f66e7d4f73782cff7c8f1f0/examples/22_stop_parsing_with_--.rs

arowana:~/the-best-projects-in-the-universe/anchor/tests/events$ ../../target/debug/anchor build -- --help
solana-cargo-build-bpf 1.7.10
Compile a local package and all of its dependencies using the Solana BPF SDK

USAGE:
    cargo-build-bpf [FLAGS] [OPTIONS]

FLAGS:
        --dump                   Dump ELF information to a text file on success
    -h, --help                   Prints help information
        --no-default-features    Do not activate the `default` feature
        --offline                Run without accessing the network
    -V, --version                Prints version information
    -v, --verbose                Use verbose output
        --workspace              Build all BPF packages in the workspace

OPTIONS:
        --bpf-out-dir <DIRECTORY>    Place final BPF build artifacts in this directory
        --bpf-sdk <PATH>             Path to the Solana BPF SDK [default:
                                     /home/<yolo>/.local/share/solana/install/releases/1.7.10/solana-
                                     release/bin/sdk/bpf]
        --features <FEATURES>...     Space-separated list of features to activate
        --manifest-path <PATH>       Path to Cargo.toml

Thoughts?

[Arrowana]

This is only for anchor build, I suppose anchor test should run from the standard setup, but should this work for anchor deploy?

[armaniferrante]

This is only for anchor build, I suppose anchor test should run from the standard setup, but should this work for anchor deploy?

Yes we should have this for any command that calls cargo build-bpf.