Build

`unsupported` opt-in backend #486

Job	Run time
Cross (x86_64-unknown-illumos)	41s
Tier 2 (aarch64-linux-android)	16s
Apple Other	58s
Tier 2 (x86_64-fortanix-unknown-sgx)	16s
Tier 2 (x86_64-unknown-redox)	20s
Tier 2 (x86_64-unknown-fuchsia)	21s
Linux x32 (x86_64-unknown-linux-gnux32)	30s
UEFI RNG Protocol (aarch64-unknown-uefi)	30s
Tier 3 (aarch64-kmc-solid_asp3)	27s
Tier 3 (aarch64-unknown-nto-qnx710)	24s
UEFI RNG Protocol (x86_64-unknown-uefi)	30s
Tier 3 (armv6k-nintendo-3ds)	23s
Tier 3 (armv7-sony-vita-newlibeabihf)	24s
Tier 3 (riscv32imc-esp-espidf)	23s
Tier 3 (x86_64-unknown-hermit)	25s
Tier 3 (x86_64-unknown-linux-none)	26s
Tier 3 (x86_64-unknown-haiku)	27s
Tier 3 (i686-unknown-hurd-gnu)	25s
Tier 3 (x86_64-unknown-dragonfly)	25s
RDRAND UEFI (i686-unknown-uefi)	31s
Tier 3 (x86_64-wrs-vxworks)	25s
Runtime error	17s
Build Raw Linux (loongarch64-unknown-linux-gnu)	20s
RNDR	20s
RDRAND UEFI (x86_64-unknown-uefi)	31s
No Atomics	17s
Web with Atomics	32s
Web no_std	29s
WasmV1 no_std with Atomics	32s
Build Raw Linux (arm-unknown-linux-gnueabihf)	22s
Build Raw Linux (riscv64gc-unknown-linux-gnu)	28s
WasmV1 no_std	30s
Build Raw Linux (aarch64-unknown-linux-gnu)	23s
UEFI RNG Protocol (i686-unknown-uefi)	31s
Build Raw Linux (x86_64-unknown-linux-gnu)	24s
Build Raw Linux (i686-unknown-linux-gnu)	26s
Build Raw Linux (x86_64-unknown-linux-gnux32)	23s
Build Raw Linux (s390x-unknown-linux-gnu)	22s
Build Raw Linux (riscv32gc-unknown-linux-gnu)	21s
Web no_std with Atomics	28s
Web	29s
	17m 52s

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