Integrate meta-guf-machine/add_LICENSE.txt

Commit: https://git.seco.com/seco-ne/yocto/layers/meta-guf-machine/-/commit/66d98abb1b077a421da78edc6ec35643ac00b852

LICENSE: Add Apache 2.0 license file

According to our company licensing policy for software the Yocto layers should be licensed under the Apache 2.0 license. Adapt the LICENSE-2.0.txt file from https://www.apache.org/licenses/LICENSE-2.0.txt as described in the APPENDIX.

Add the license as LICENSE.txt file to the layer repository.

BCS 746-000657