Copyright for rust-crossbeam-channel source package in Yangtze V1.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: rust-crossbeam-channel
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Files:     .cargo_vcs_info.json
           CHANGELOG.md
           Cargo.lock
           Cargo.toml
           Cargo.toml.orig
           benches/crossbeam.rs
           examples/fibonacci.rs
           examples/matching.rs
           examples/stopwatch.rs
           src/channel.rs
           src/context.rs
           src/counter.rs
           src/err.rs
           src/flavors/array.rs
           src/flavors/at.rs
           src/flavors/list.rs
           src/flavors/mod.rs
           src/flavors/never.rs
           src/flavors/tick.rs
           src/flavors/zero.rs
           src/lib.rs
           src/select.rs
           src/select_macro.rs
           src/utils.rs
           src/waker.rs
           tests/after.rs
           tests/array.rs
           tests/golang.rs
           tests/iter.rs
           tests/list.rs
           tests/mpsc.rs
           tests/never.rs
           tests/ready.rs
           tests/same_channel.rs
           tests/select.rs
           tests/select_macro.rs
           tests/thread_locals.rs
           tests/tick.rs
           tests/zero.rs
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