/usr/lib/x86_64-linux-gnu/libEGL.so.1 is in libegl1-mesa 10.3.2-1+deb8u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libEGL.so.1.0.0
/usr/lib/x86_64-linux-gnu/libEGL.so.1.0.0