rtld: Add list of supported DT_FLAGS{,_1} to ignore #4049

Job	Run time
Compile sysdeps (dripos)	2m 30s
Build mlibc (x86_64, mlibc, gcc)	1s
Compile sysdeps (lemon)	2m 36s
Build mlibc (x86_64, mlibc-static, gcc)	1s
Compile sysdeps (aero)	2m 35s
Build mlibc (x86_64, mlibc-shared, gcc)	1s
Compile sysdeps (ironclad)	2m 50s
Build mlibc (x86_64, mlibc-ansi-only, gcc)	1s
Compile sysdeps (lyre)	2m 28s
Build mlibc (x86_64, mlibc-headers-only, gcc)	1s
Compile sysdeps (keyronex)	2m 34s
Build mlibc (riscv64, mlibc, gcc)	17s
Compile sysdeps (managarm)	7m 47s
Build mlibc (riscv64, mlibc-static, gcc)	3s
Compile sysdeps (vinix)	2m 31s
Compile sysdeps (astral)	2m 32s
Build mlibc (riscv64, mlibc-shared, gcc)	4s
Build mlibc (riscv64, mlibc-ansi-only, gcc)	11s
Build mlibc (riscv64, mlibc-headers-only, gcc)	6s
Build mlibc (aarch64, mlibc, gcc)	2m 40s
Build mlibc (aarch64, mlibc-static, gcc)	2m 39s
Build mlibc (aarch64, mlibc-shared, gcc)	2m 35s
Build mlibc (aarch64, mlibc-ansi-only, gcc)	2m 40s
Build mlibc (aarch64, mlibc-headers-only, gcc)	2m 10s
Build mlibc (x86, mlibc, gcc)	1s
Build mlibc (x86, mlibc-static, gcc)	1s
Build mlibc (x86, mlibc-shared, gcc)	1s
Build mlibc (x86, mlibc-ansi-only, gcc)	1s
Build mlibc (x86, mlibc-headers-only, gcc)	1s
Build mlibc (m68k, mlibc, gcc)	2m 41s
Build mlibc (m68k, mlibc-static, gcc)	2m 29s
Build mlibc (m68k, mlibc-shared, gcc)	24s
Build mlibc (m68k, mlibc-ansi-only, gcc)	2m 27s
Build mlibc (m68k, mlibc-headers-only, gcc)	2m 2s
Build mlibc (x86_64, mlibc, clang)	2s
	52m 3s

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