/usr/include/python2.7_d/Imaging.h is in python-pil-dbg 2.6.1-2+deb8u3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/include/python2.7_d/../python2.7/Imaging.h
/usr/include/python2.7_d/../python2.7/Imaging.h