Update LICENSE.md

LICENSE.md

@@ -1,6 +1,10 @@
-License
-=======
+License for package patches
+===========================
 The scripts and patches to build each package is licensed under the same license as
 the actual package (so the patches and scripts to build bash are licensed under
 the same license as bash, while the patches and scripts to build python are licensed
 under the same license as python).
+
+License for the build infrastructure
+====================================
+For build infrastructure outside the `packages/` folder the license is [Apache License, Version 2.0](https://www.apache.org/licenses/LICENSE-2.0).