Add gitattributes #60

Job	Run time
Doc	17s
Clippy	16s
Cross / i686-unknown-linux-gnu	1m 6s
Format	13s
Cross / i586-unknown-linux-gnu	1m 0s
Miri /	44s
Test / x86_64-pc-windows-msvc	1m 56s
Cross / armv7-unknown-linux-gnueabihf	1m 7s
Toolchain / stable	17s
Miri / --release	45s
Cross / aarch64-unknown-linux-gnu	1m 2s
Test / x86_64-pc-windows-msvc --release	2m 6s
Toolchain / stable --release	25s
Toolchain / beta	22s
Cross / thumbv6m-none-eabi	1m 1s
Toolchain / beta --release	26s
Toolchain / nightly	24s
Toolchain / nightly --release	30s
	13m 57s

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