block-padding: implement ISO 10126 #408

Job	Run time
aarch64 (aarch64-unknown-linux-gnu, 1.60.0)	3m 1s
aarch64 (aarch64-unknown-linux-gnu, stable)	54s
build (1.60.0, armv7a-none-eabi)	2m 1s
build (1.60.0, thumbv7em-none-eabi)	2m 0s
build (1.60.0, wasm32-unknown-unknown)	1m 58s
build (stable, armv7a-none-eabi)	7s
build (stable, thumbv7em-none-eabi)	9s
build (stable, wasm32-unknown-unknown)	16s
cross (powerpc-unknown-linux-gnu, 1.60.0)	2m 54s
cross (powerpc-unknown-linux-gnu, stable)	53s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.60.0, sudo apt update && sudo apt install gcc-mult...	2m 34s
test (i686-unknown-linux-gnu, ubuntu-latest, stable, sudo apt update && sudo apt install gcc-mult...	58s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.60.0)	2m 8s
test (x86_64-unknown-linux-gnu, ubuntu-latest, stable)	21s
test (x86_64-apple-darwin, macos-latest, 1.60.0)	2m 41s
test (x86_64-apple-darwin, macos-latest, stable)	38s
test (x86_64-pc-windows-msvc, windows-latest, 1.60.0)	2m 55s
test (x86_64-pc-windows-msvc, windows-latest, stable)	4m 17s
minimal-versions / minimal-versions	1m 15s
	32m 0s

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