/usr/lib/klibc/include/arch/mips/ is in libklibc-dev 2.0.4-8ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/klibc/include/arch/mips/klibc/
/usr/lib/klibc/include/arch/mips/klibc/archconfig.h
/usr/lib/klibc/include/arch/mips/klibc/archfcntl.h
/usr/lib/klibc/include/arch/mips/klibc/archsetjmp.h
/usr/lib/klibc/include/arch/mips/klibc/archsignal.h
/usr/lib/klibc/include/arch/mips/klibc/archsocket.h
/usr/lib/klibc/include/arch/mips/klibc/archstat.h
/usr/lib/klibc/include/arch/mips/machine/
/usr/lib/klibc/include/arch/mips/machine/asm.h
/usr/lib/klibc/include/arch/mips/sgidefs.h
/usr/lib/klibc/include/arch/mips/spaces.h
/usr/lib/klibc/include/arch/mips64/klibc/
/usr/lib/klibc/include/arch/mips64/klibc/archconfig.h
/usr/lib/klibc/include/arch/mips64/klibc/archsetjmp.h
/usr/lib/klibc/include/arch/mips64/klibc/archsignal.h
/usr/lib/klibc/include/arch/mips64/klibc/archsocket.h
/usr/lib/klibc/include/arch/mips64/klibc/archstat.h
/usr/lib/klibc/include/arch/mips64/machine/
/usr/lib/klibc/include/arch/mips64/machine/asm.h