WIP: Upgrade Snitch to support RVV and FP. #1136

Job	Run time
verilator	16s
tc-llvm	3m 26s
riscv-isa-sim	14s
check-opcodes	5s
tc-gcc	2m 5s
verilator-model (minpool)	19s
verilator-model (mempool)	22s
check-bootrom	16s
build-apps-gcc (minpool)	1m 0s
unit-test	0s
build-apps-gcc (mempool)	1m 0s
build-apps-omp (minpool)	32s
build-apps-omp (mempool)	36s
run-apps-gcc	0s
build-apps-llvm (minpool)	1m 29s
tc-halide	21s
build-apps-llvm (mempool)	1m 13s
build-apps-halide (minpool)	54s
build-apps-halide (mempool)	54s
run-apps-halide	0s
run-apps-llvm	0s
clean-up	2s
clean-up-compile-runs (minpool)	2s
clean-up-compile-runs (mempool)	2s
	15m 8s

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