Some self-hosting fixes for Managarm #3831

Job	Run time
Compile sysdeps (dripos)	2m 3s
Compile sysdeps (lemon)	2m 7s
Build mlibc (x86_64, mlibc, gcc)	1m 51s
Compile sysdeps (aero)	2m 2s
Build mlibc (x86_64, mlibc-static, gcc)	1m 49s
Compile sysdeps (ironclad)	2m 2s
Build mlibc (x86_64, mlibc-shared, gcc)	1m 54s
Compile sysdeps (lyre)	2m 3s
Build mlibc (x86_64, mlibc-ansi-only, gcc)	1m 55s
Compile sysdeps (keyronex)	2m 6s
Build mlibc (x86_64, mlibc-headers-only, gcc)	1m 54s
Compile sysdeps (managarm)	2m 19s
Build mlibc (riscv64, mlibc, gcc)	3m 17s
Compile sysdeps (vinix)	2m 4s
Build mlibc (riscv64, mlibc-static, gcc)	2m 2s
Build mlibc (riscv64, mlibc-shared, gcc)	2m 1s
Build mlibc (riscv64, mlibc-ansi-only, gcc)	2m 47s
Build mlibc (riscv64, mlibc-headers-only, gcc)	1m 51s
Build mlibc (aarch64, mlibc, gcc)	3m 40s
Build mlibc (aarch64, mlibc-static, gcc)	3m 1s
Build mlibc (aarch64, mlibc-shared, gcc)	3m 3s
Build mlibc (aarch64, mlibc-ansi-only, gcc)	2m 51s
Build mlibc (aarch64, mlibc-headers-only, gcc)	1m 55s
Build mlibc (x86, mlibc, gcc)	1m 53s
Build mlibc (x86, mlibc-static, gcc)	49s
Build mlibc (x86, mlibc-shared, gcc)	53s
Build mlibc (x86, mlibc-ansi-only, gcc)	1m 37s
Build mlibc (x86, mlibc-headers-only, gcc)	1m 31s
Build mlibc (x86_64, mlibc, clang)	2m 1s
	1h 1m 21s

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