Add ECCN (#329) #612

Job	Run time
format	17s
cargo-build (aarch64-linux-android, ubuntu-22.04)	2m 57s
Clippy	50s
cargo-build (armv7-linux-androideabi, ubuntu-22.04)	3m 2s
cargo-test (ubuntu-22.04, default, stable)	3m 11s
cargo-build (i686-linux-android, ubuntu-22.04)	2m 46s
cargo-test (macos-13, default, stable)	6m 42s
cargo-build (x86_64-linux-android, ubuntu-22.04)	2m 41s
cargo-test (windows-2019, default, stable)	7m 47s
cargo-build (x86_64-unknown-linux-musl, ubuntu-22.04)	2m 15s
cargo-test (ubuntu-22.04, beta)	4m 27s
cargo-build (aarch64-apple-ios, macos-13)	3m 29s
cargo-test (ubuntu-22.04, blocking)	4m 27s
cargo-test (ubuntu-22.04, blocking,beta)	4m 43s
cargo-test (ubuntu-22.04, tls-rustls --no-default-features)	4m 3s
cargo-test (ubuntu-22.04, tls-vendored-openssl --no-default-features)	5m 1s
cargo-test (ubuntu-22.04, beta, default)	3m 4s
cargo-test (ubuntu-22.04, 1.75.0, default)	4m 9s
	1h 5m 51s

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