/usr/include/glbinding/gl32/ is in libglbinding-dev 2.1.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/glbinding/gl32/bitfield.h
/usr/include/glbinding/gl32/boolean.h
/usr/include/glbinding/gl32/enum.h
/usr/include/glbinding/gl32/functions.h
/usr/include/glbinding/gl32/gl.h
/usr/include/glbinding/gl32/types.h
/usr/include/glbinding/gl32/values.h
/usr/include/glbinding/gl32core/bitfield.h
/usr/include/glbinding/gl32core/boolean.h
/usr/include/glbinding/gl32core/enum.h
/usr/include/glbinding/gl32core/functions.h
/usr/include/glbinding/gl32core/gl.h
/usr/include/glbinding/gl32core/types.h
/usr/include/glbinding/gl32core/values.h
/usr/include/glbinding/gl32ext/bitfield.h
/usr/include/glbinding/gl32ext/boolean.h
/usr/include/glbinding/gl32ext/enum.h
/usr/include/glbinding/gl32ext/functions.h
/usr/include/glbinding/gl32ext/gl.h
/usr/include/glbinding/gl32ext/types.h
/usr/include/glbinding/gl32ext/values.h