Track permissions as bytes #683

Job	Run time
iOS (aarch64-apple-ios, iphoneos)	49s
iOS (x86_64-apple-ios, iphonesimulator)	58s
Windows AArch64	1m 39s
Test (ubuntu-20.04, stable)	2m 54s
Test (ubuntu-20.04, beta)	3m 44s
Test (ubuntu-20.04, nightly)	3m 28s
Test (macos-latest, stable)	4m 27s
Test (macos-latest, nightly)	5m 14s
Test (windows-latest, stable-x86_64-msvc)	3m 36s
Test (windows-latest, stable-i686-msvc)	4m 48s
Test (windows-latest, stable-x86_64-gnu)	5m 17s
Docker (aarch64-unknown-linux-gnu)	1m 11s
Docker (arm-unknown-linux-gnueabihf)	1m 6s
Docker (armv7-unknown-linux-gnueabihf)	57s
Docker (i586-unknown-linux-gnu)	47s
Docker (i686-unknown-linux-gnu)	55s
Docker (powerpc64-unknown-linux-gnu)	1m 17s
Docker (s390x-unknown-linux-gnu)	1m 26s
Docker (x86_64-pc-windows-gnu)	1m 20s
Docker (x86_64-unknown-linux-gnu)	54s
Docker (x86_64-unknown-linux-musl)	57s
Docker (arm-linux-androideabi)	2m 16s
Docker (armv7-linux-androideabi)	2m 8s
Docker (aarch64-linux-android)	2m 22s
Docker (i686-linux-android)	1m 58s
Docker (x86_64-linux-android)	2m 18s
Build Targets (wasm32-unknown-unknown)	25s
Build Targets (wasm32-wasi)	21s
Build Targets (x86_64-unknown-fuchsia)	28s
Build Targets (x86_64-fortanix-unknown-sgx)	23s
Build Targets (x86_64-unknown-illumos)	25s
MSRV	59s
Miri	4m 44s
Rustfmt	6s
	1h 6m 37s

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