rtld: Add list of supported DT_FLAGS{,_1} to ignore #4048

Job	Run time
Compile sysdeps (dripos)	2m 17s
Compile sysdeps (lemon)	2m 27s
Build mlibc (x86_64, mlibc, gcc)	4m 26s
Compile sysdeps (aero)	2m 15s
Build mlibc (x86_64, mlibc-static, gcc)	3m 9s
Compile sysdeps (ironclad)	2m 14s
Build mlibc (x86_64, mlibc-shared, gcc)	3m 6s
Compile sysdeps (lyre)	2m 15s
Build mlibc (x86_64, mlibc-ansi-only, gcc)	2m 59s
Compile sysdeps (keyronex)	2m 17s
Build mlibc (x86_64, mlibc-headers-only, gcc)	1m 58s
Compile sysdeps (managarm)	2m 44s
Build mlibc (riscv64, mlibc, gcc)	3m 50s
Compile sysdeps (vinix)	2m 11s
Build mlibc (riscv64, mlibc-static, gcc)	4m 37s
Compile sysdeps (astral)	2m 20s
Build mlibc (riscv64, mlibc-shared, gcc)	3m 15s
Build mlibc (riscv64, mlibc-ansi-only, gcc)	3m 0s
Build mlibc (riscv64, mlibc-headers-only, gcc)	2m 7s
Build mlibc (aarch64, mlibc, gcc)	4m 1s
Build mlibc (aarch64, mlibc-static, gcc)	3m 14s
Build mlibc (aarch64, mlibc-shared, gcc)	3m 28s
Build mlibc (aarch64, mlibc-ansi-only, gcc)	3m 2s
Build mlibc (aarch64, mlibc-headers-only, gcc)	2m 31s
Build mlibc (x86, mlibc, gcc)	3m 55s
Build mlibc (x86, mlibc-static, gcc)	3m 14s
Build mlibc (x86, mlibc-shared, gcc)	3m 18s
Build mlibc (x86, mlibc-ansi-only, gcc)	3m 9s
Build mlibc (x86, mlibc-headers-only, gcc)	2m 5s
Build mlibc (m68k, mlibc, gcc)	3m 30s
Build mlibc (m68k, mlibc-static, gcc)	3m 6s
Build mlibc (m68k, mlibc-shared, gcc)	2m 55s
Build mlibc (m68k, mlibc-ansi-only, gcc)	2m 44s
Build mlibc (m68k, mlibc-headers-only, gcc)	2m 5s
Build mlibc (x86_64, mlibc, clang)	3m 21s
	1h 43m 5s

Provide feedback