/usr/share/doc/libjbig2dec0-dev/README is in libjbig2dec0-dev 0.11+20120125-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libjbig2dec0-dev/../libjbig2dec0/README
/usr/share/doc/libjbig2dec0-dev/../libjbig2dec0/README