Define a workspace in rust/ so that bssl-sys and bssl-crypto crates can
be built and tested at once from the rust/ directory:
cd rust
cargo build --workspace
cargo test --workspace
(The --workspace arg is optional since this is a virtual manifest; the
default is the whole workspace.)
Change-Id: I88fb738a96837ce19b53fdaeabe91491fa0240fd
Bug: 42290446
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/80527
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Auto-Submit: Lily Chen <chlily@google.com>
