sysdeps/managarm: avoid sandbox violations #3776

Job	Run time
Compile sysdeps (dripos)	2m 11s
Compile sysdeps (lemon)	2m 46s
Compile sysdeps (aero)	2m 31s
Build mlibc (x86_64, mlibc, gcc)	3m 17s
Compile sysdeps (ironclad)	2m 13s
Build mlibc (x86_64, mlibc-static, gcc)	3m 6s
Compile sysdeps (lyre)	2m 15s
Build mlibc (x86_64, mlibc-shared, gcc)	2m 38s
Compile sysdeps (keyronex)	2m 31s
Build mlibc (x86_64, mlibc-ansi-only, gcc)	2m 29s
Build mlibc (x86_64, mlibc-headers-only, gcc)	2m 4s
Compile sysdeps (managarm)	2m 22s
Build mlibc (riscv64, mlibc, gcc)	3m 26s
Compile sysdeps (vinix)	2m 12s
Build mlibc (riscv64, mlibc-static, gcc)	4m 12s
Build mlibc (riscv64, mlibc-shared, gcc)	2m 47s
Build mlibc (riscv64, mlibc-ansi-only, gcc)	2m 31s
Build mlibc (riscv64, mlibc-headers-only, gcc)	1m 42s
Build mlibc (aarch64, mlibc, gcc)	3m 23s
Build mlibc (aarch64, mlibc-static, gcc)	3m 18s
Build mlibc (aarch64, mlibc-shared, gcc)	2m 53s
Build mlibc (aarch64, mlibc-ansi-only, gcc)	2m 57s
Build mlibc (aarch64, mlibc-headers-only, gcc)	1m 55s
Build mlibc (x86, mlibc, gcc)	3m 25s
Build mlibc (x86, mlibc-static, gcc)	3m 10s
Build mlibc (x86, mlibc-shared, gcc)	2m 42s
Build mlibc (x86, mlibc-ansi-only, gcc)	2m 43s
Build mlibc (x86, mlibc-headers-only, gcc)	1m 45s
Build mlibc (x86_64, mlibc, clang)	2m 33s
	1h 17m 57s

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