Add BinEinsum to suite-unit #7421

Job	Run time
linux (raspbian)	9m 42s
linux (aarch64-unknown-linux-gnu)	18m 30s
apple (aarch64-apple-ios)	2m 21s
linux (aarch64-unknown-linux-gnu-stretch)	10m 44s
apple (aarch64-apple-darwin)	5m 6s
linux (armv6vfp-unknown-linux-gnueabihf)	14m 52s
linux (armv7-unknown-linux-gnueabihf)	11m 1s
linux (armv7-unknown-linux-gnueabihf-stretch)	10m 40s
linux (aarch64-unknown-linux-musl)	17m 50s
linux (cortexa53-unknown-linux-musl)	16m 46s
linux (armv7-unknown-linux-musl)	11m 14s
linux (aarch64-linux-android)	4m 33s
linux (armv7-linux-androideabi)	2m 27s
linux (i686-linux-android)	2m 27s
linux (x86_64-linux-android)	4m 41s
linux (wasm32-unknown-unknown)	31s
linux (wasm32-wasi)	3m 25s
	2h 26m 50s

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