/usr/src/glibc/debian/patches/alpha/ is in eglibc-source 2.15-0ubuntu10.
This file is owned by root:root, with mode 0o755.
..
/usr/src/glibc/debian/patches/alpha/local-gcc4.1.diff
/usr/src/glibc/debian/patches/alpha/local-lowlevellock.diff
/usr/src/glibc/debian/patches/alpha/local-strncmp.diff
/usr/src/glibc/debian/patches/alpha/submitted-PTR_MANGLE.diff
/usr/src/glibc/debian/patches/alpha/submitted-____longjmp_chk.diff
/usr/src/glibc/debian/patches/alpha/submitted-creat64.diff
/usr/src/glibc/debian/patches/alpha/submitted-dl-support.diff
/usr/src/glibc/debian/patches/alpha/submitted-epoll_create1.diff
/usr/src/glibc/debian/patches/alpha/submitted-fallocated.diff
/usr/src/glibc/debian/patches/alpha/submitted-fcntl_h.diff
/usr/src/glibc/debian/patches/alpha/submitted-fxstatat.patch
/usr/src/glibc/debian/patches/alpha/submitted-libm-hidden.diff
/usr/src/glibc/debian/patches/alpha/submitted-rtld-fPIC.diff
/usr/src/glibc/debian/patches/alpha/submitted-stackinfo.diff
/usr/src/glibc/debian/patches/alpha/submitted-statfs.diff
/usr/src/glibc/debian/patches/alpha/submitted-statfs64.patch
/usr/src/glibc/debian/patches/alpha/submitted-syscall.diff
/usr/src/glibc/debian/patches/alpha/submitted-sysconf-cache.diff