rtld: Use breadth-first search order #4311

Job	Run time
Compile sysdeps (dripos)	2m 33s
Compile sysdeps (lemon)	2m 38s
Build mlibc (x86_64, mlibc, gcc)	3m 10s
Compile sysdeps (aero)	2m 49s
Build mlibc (x86_64, mlibc-static, gcc)	2m 47s
Compile sysdeps (ironclad)	2m 32s
Build mlibc (x86_64, mlibc-shared, gcc)	2m 49s
Compile sysdeps (lyre)	2m 30s
Build mlibc (x86_64, mlibc-ansi-only, gcc)	3m 7s
Compile sysdeps (keyronex)	2m 39s
Build mlibc (x86_64, mlibc-headers-only, gcc)	2m 3s
Build mlibc (riscv64, mlibc, gcc)	3m 25s
Compile sysdeps (managarm)	3m 4s
Build mlibc (riscv64, mlibc-static, gcc)	3m 22s
Compile sysdeps (vinix)	2m 38s
Build mlibc (riscv64, mlibc-shared, gcc)	3m 14s
Compile sysdeps (astral)	2m 35s
Build mlibc (riscv64, mlibc-ansi-only, gcc)	3m 8s
Build mlibc (riscv64, mlibc-headers-only, gcc)	2m 3s
Build mlibc (aarch64, mlibc, gcc)	4m 29s
Build mlibc (aarch64, mlibc-static, gcc)	3m 31s
Build mlibc (aarch64, mlibc-shared, gcc)	3m 42s
Build mlibc (aarch64, mlibc-ansi-only, gcc)	3m 17s
Build mlibc (aarch64, mlibc-headers-only, gcc)	2m 17s
Build mlibc (x86, mlibc, gcc)	2m 47s
Build mlibc (x86, mlibc-static, gcc)	2m 9s
Build mlibc (x86, mlibc-shared, gcc)	2m 8s
Build mlibc (x86, mlibc-ansi-only, gcc)	2m 25s
Build mlibc (x86, mlibc-headers-only, gcc)	2m 3s
Build mlibc (m68k, mlibc, gcc)	3m 47s
Build mlibc (m68k, mlibc-static, gcc)	3m 6s
Build mlibc (m68k, mlibc-shared, gcc)	3m 33s
Build mlibc (m68k, mlibc-ansi-only, gcc)	3m 1s
Build mlibc (m68k, mlibc-headers-only, gcc)	2m 0s
Build mlibc (x86_64, mlibc, clang)	3m 12s
	1h 40m 33s

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