cmov

fiat-constify: add support for leveraging `const_mut_refs` (#1177) #667

Job	Run time
build (1.85.0, thumbv7em-none-eabi)	15s
cross (powerpc-unknown-linux-gnu, stable)	31s
build (stable, thumbv7em-none-eabi)	9s
cross (powerpc-unknown-linux-gnu, 1.85.0)	35s
build (stable, wasm32-unknown-unknown)	8s
test (i686-unknown-linux-gnu, ubuntu-latest, 1.85.0, sudo apt update && sudo apt install gcc-mult...	26s
build (1.85.0, wasm32-unknown-unknown)	19s
cross (aarch64-unknown-linux-gnu, stable)	26s
cross (aarch64-unknown-linux-gnu, 1.85.0)	41s
minimal-versions / minimal-versions	20s
test (x86_64-unknown-linux-gnu, ubuntu-latest, 1.85.0)	12s
test (x86_64-pc-windows-msvc, windows-latest, 1.85.0)	32s
test (x86_64-apple-darwin, macos-latest, 1.85.0)	20s
	4m 54s

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