glTF rendering: workaround for camera movements

If the glTF contains camera movement in it moving camera
by keyboard didn't work very well.

Change-Id: I9300a257858d4f35c2d622654a0c2fd85eedc5ed
Patching libgltf: fix wrong deallocation method

Change-Id: I05c5650c1e43cf9ac4156e8d74073bf92ac0c4df