/usr/include/glbinding/gl13/ is in libglbinding-dev 2.1.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/glbinding/gl13/bitfield.h
/usr/include/glbinding/gl13/boolean.h
/usr/include/glbinding/gl13/enum.h
/usr/include/glbinding/gl13/functions.h
/usr/include/glbinding/gl13/gl.h
/usr/include/glbinding/gl13/types.h
/usr/include/glbinding/gl13/values.h
/usr/include/glbinding/gl13ext/bitfield.h
/usr/include/glbinding/gl13ext/boolean.h
/usr/include/glbinding/gl13ext/enum.h
/usr/include/glbinding/gl13ext/functions.h
/usr/include/glbinding/gl13ext/gl.h
/usr/include/glbinding/gl13ext/types.h
/usr/include/glbinding/gl13ext/values.h