AA: Jumbled features when building the binary

[surajssd]

When building the attestation agent, the features list has some features space separated and others comma separated under the same double quotes: --features "sample_kbc grpc,rust-crypto".

$ make build
DEBIANOS is: true
cd app &&  cargo build --release --no-default-features --features "sample_kbc grpc,rust-crypto" --target x86_64-unknown-linux-gnu
/home/surajaz/code/work/image-rs/attestation-agent/app
    Updating crates.io index
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