/usr/src/glibc/debian/patches/series.powerpc is in eglibc-source 2.15-0ubuntu10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # Revert (powerpc buildds still run 2.6.15 kernels):
any/revert-cvs-futimens.diff
|