/usr/src/glibc/debian/patches/arm/ is in eglibc-source 2.15-0ubuntu10.
This file is owned by root:root, with mode 0o755.
..
/usr/src/glibc/debian/patches/arm/armhf-check.patch
/usr/src/glibc/debian/patches/arm/cvs-makecontext.diff
/usr/src/glibc/debian/patches/arm/cvs-syscall-mcount.diff
/usr/src/glibc/debian/patches/arm/cvs-ucontext.diff
/usr/src/glibc/debian/patches/arm/local-atomic.diff
/usr/src/glibc/debian/patches/arm/local-eabi-wchar.diff
/usr/src/glibc/debian/patches/arm/local-ioperm.diff
/usr/src/glibc/debian/patches/arm/local-linaro-cortex-strings.diff
/usr/src/glibc/debian/patches/arm/local-lowlevellock.diff
/usr/src/glibc/debian/patches/arm/local-sigaction.diff
/usr/src/glibc/debian/patches/arm/unsubmitted-armhf-linker.diff
/usr/src/glibc/debian/patches/arm/unsubmitted-ldconfig-cache-abi.diff
/usr/src/glibc/debian/patches/arm/unsubmitted-ldso-abi-check.diff
/usr/src/glibc/debian/patches/arm/unsubmitted-soname-hack.diff