git submodules not initialized anymore

**Describe the bug** Git Revision 4926f1af108750d4c2d19a906e0417f4f33f7700 breaks the [tensorflow-lite bindings](https://github.com/CrazyChaoz/tflite-rs) as git submodules are not initialized (by default ?) anymore Revision 2510f2cbc3ccd237f700bb213756a8f35c32d8d7 still worked (tflite-rs uses the submodules to get the header files, now these files are missing) **Reproduction** test this project with the 2 different revisions: https://git.ins.jku.at/proj/digidow/face-lib