/usr/lib/x86_64-linux-gnu/imlib2/ is in libimlib2-dev 1.4.6-2+deb8u2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/imlib2/filters/
/usr/lib/x86_64-linux-gnu/imlib2/filters/bumpmap.la
/usr/lib/x86_64-linux-gnu/imlib2/filters/colormod.la
/usr/lib/x86_64-linux-gnu/imlib2/filters/testfilter.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/
/usr/lib/x86_64-linux-gnu/imlib2/loaders/argb.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/bmp.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/bz2.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/gif.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/id3.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/jpeg.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/lbm.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/png.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/pnm.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/tga.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/tiff.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/xpm.la
/usr/lib/x86_64-linux-gnu/imlib2/loaders/zlib.la