Build

improve cleanup-rootfs.sh #590

Job	Run time
Initialize submodule cache	39s
test-sim (ubuntu-24.04, newlib, rv64gc-lp64d, spike)	2h 36m 40s
build (ubuntu-22.04, newlib, rv32gc-ilp32d, gcc)	40m 0s
build-multilib	0s
build (ubuntu-22.04, newlib, rv32gc-ilp32d, llvm)	1h 58m 40s
build (ubuntu-22.04, newlib, rv64gc-lp64d, gcc)	41m 46s
build (ubuntu-22.04, newlib, rv64gc-lp64d, llvm)	2h 2m 9s
build (ubuntu-22.04, linux, rv32gc-ilp32d, gcc)	49m 19s
build (ubuntu-22.04, linux, rv32gc-ilp32d, llvm)	2h 8m 31s
build (ubuntu-22.04, linux, rv64gc-lp64d, gcc)	47m 34s
build (ubuntu-22.04, linux, rv64gc-lp64d, llvm)	2h 13m 35s
build (ubuntu-22.04, musl, rv32gc-ilp32d, gcc)	41m 59s
build (ubuntu-22.04, musl, rv64gc-lp64d, gcc)	41m 45s
build (ubuntu-22.04, uclibc, rv32gc-ilp32d, gcc)	35m 13s
build (ubuntu-22.04, uclibc, rv64gc-lp64d, gcc)	35m 11s
build (ubuntu-24.04, newlib, rv32gc-ilp32d, gcc)	2h 15m 17s
build (ubuntu-24.04, newlib, rv32gc-ilp32d, llvm)	2h 14m 56s
build (ubuntu-24.04, newlib, rv64gc-lp64d, gcc)	2h 19m 40s
build (ubuntu-24.04, newlib, rv64gc-lp64d, llvm)	2h 17m 4s
build (ubuntu-24.04, linux, rv32gc-ilp32d, gcc)	3h 11m 55s
build (ubuntu-24.04, linux, rv32gc-ilp32d, llvm)	2h 23m 44s
build (ubuntu-24.04, linux, rv64gc-lp64d, gcc)	3h 20m 45s
build (ubuntu-24.04, linux, rv64gc-lp64d, llvm)	2h 26m 42s
build (ubuntu-24.04, musl, rv32gc-ilp32d, gcc)	45m 9s
build (ubuntu-24.04, musl, rv64gc-lp64d, gcc)	46m 54s
build (ubuntu-24.04, uclibc, rv32gc-ilp32d, gcc)	40m 15s
build (ubuntu-24.04, uclibc, rv64gc-lp64d, gcc)	39m 5s
	1d 15h 54m 27s

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