sysdeps/managarm: Stub setsockopt with SOL_SOCKET and SO_PRIORITY #987

Job	Run time
Build mlibc (x86_64, mlibc, gcc)	3m 27s
Compile sysdeps (dripos)	2m 5s
Build mlibc (x86_64, mlibc-static, gcc)	2m 58s
Compile sysdeps (lemon)	2m 4s
Build mlibc (x86_64, mlibc-shared, gcc)	2m 50s
Compile sysdeps (aero)	2m 6s
Build mlibc (x86_64, mlibc-ansi-only, gcc)	2m 44s
Compile sysdeps (ironclad)	2m 1s
Build mlibc (x86_64, mlibc-headers-only, gcc)	1m 56s
Compile sysdeps (lyre)	2m 7s
Build mlibc (riscv64, mlibc, gcc)	3m 30s
Compile sysdeps (keyronex)	2m 13s
Build mlibc (riscv64, mlibc-static, gcc)	4m 5s
Compile sysdeps (managarm)	2m 21s
Build mlibc (riscv64, mlibc-shared, gcc)	2m 48s
Compile sysdeps (vinix)	2m 2s
Build mlibc (riscv64, mlibc-ansi-only, gcc)	2m 42s
Build mlibc (riscv64, mlibc-headers-only, gcc)	1m 53s
Build mlibc (aarch64, mlibc, gcc)	3m 44s
Build mlibc (aarch64, mlibc-static, gcc)	3m 5s
Build mlibc (aarch64, mlibc-shared, gcc)	3m 3s
Build mlibc (aarch64, mlibc-ansi-only, gcc)	2m 52s
Build mlibc (aarch64, mlibc-headers-only, gcc)	1m 52s
Build mlibc (x86, mlibc, gcc)	3m 39s
Build mlibc (x86, mlibc-static, gcc)	3m 2s
Build mlibc (x86, mlibc-shared, gcc)	3m 0s
Build mlibc (x86, mlibc-ansi-only, gcc)	2m 49s
Build mlibc (x86, mlibc-headers-only, gcc)	1m 57s
Build mlibc (x86_64, mlibc, clang)	2m 47s
	1h 17m 42s

Provide feedback