/usr/share/doc/texlive-doc/lualatex/luainputenc/inputenc.sty.diff is in texlive-luatex 2012.20120611-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/texlive-doc/lualatex/luainputenc/../../../texlive-luatex/lualatex/luainputenc/inputenc.sty.diff