* Add files from TfLite

Added batch_matmul.h and tensor_utils_common.h that are needed for the BATCH_MATMUL operator.

* Arduino library creation for CI build.
Issue# 256

* fix bug with include file path flattening

* fix examples path generation

Some files in examples source and headers list are not in the examples directory.  They can be tensorflow files or third-party files.  The code is corrected so that these files end up inside the generated directory tree.  Previously, these files were being placed outside the generated directory tree and were thus invisible to follow-on targeted generation scripts.

* remove/revert files that go into the arduino-examples repo

* Format with:

```
tensorflow/lite/micro/tools/ci_build/test_code_style.sh --fix_formatting
```

* request changes to PR

* Removed symbolic link for micro_speech example from Makefile.
Added additional include flags to Makefile.
Adjusted header file transformations during base tree creation.
Co-authored-by: NAdvait Jain <advaitjain@users.noreply.github.com>
Co-authored-by: NAdvait Jain <advaitjain@google.com>