/usr/include/collada2gltf/GLTF/ is in libcollada2gltfconvert-dev 20140924-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/collada2gltf/GLTF/GLTF.h
/usr/include/collada2gltf/GLTF/GLTFAccessor.h
/usr/include/collada2gltf/GLTF/GLTFAccessorCache.h
/usr/include/collada2gltf/GLTF/GLTFAnimation.h
/usr/include/collada2gltf/GLTF/GLTFAsset.h
/usr/include/collada2gltf/GLTF/GLTFBuffer.h
/usr/include/collada2gltf/GLTF/GLTFConfig.h
/usr/include/collada2gltf/GLTF/GLTFEffect.h
/usr/include/collada2gltf/GLTF/GLTFExtraDataHandler.h
/usr/include/collada2gltf/GLTF/GLTFExtras.h
/usr/include/collada2gltf/GLTF/GLTFInputStream.h
/usr/include/collada2gltf/GLTF/GLTFMesh.h
/usr/include/collada2gltf/GLTF/GLTFOutputStream.h
/usr/include/collada2gltf/GLTF/GLTFPrimitive.h
/usr/include/collada2gltf/GLTF/GLTFProfile.h
/usr/include/collada2gltf/GLTF/GLTFSkin.h
/usr/include/collada2gltf/GLTF/GLTFTypesAndConstants.h
/usr/include/collada2gltf/GLTF/GLTFUtils.h
/usr/include/collada2gltf/GLTF/GLTFWriter.h