Most of the packages that were used by Buildroot to produce the image files,
  including Buildroot itself, have open-source licenses. It is your
  responsibility to comply to the requirements of these licenses.
  To make this easier for you, Buildroot collected in this directory some
  material you may need to get it done.
  
  This material is composed of the following items.
   * The scripts used to control compilation of the packages and the generation
     of image files, i.e. the Buildroot sources.
     Note: this has not been saved due to technical limitations, you must
     collect it manually.
   * The Buildroot configuration file; this has been saved in buildroot.config.
   * The toolchain (cross-compiler and related tools) used to generate all the
     compiled programs.
     Note: this may have not been saved due to technical limitations, you may
     need to collect it manually.
   * The original source code for all packages; this has been saved in the
     sources/ subdirectory (except for the non-redistributable packages, which
     have not been saved). Patches that were applied are also saved, along
     with a file named 'series' that lists the patches in the order they were
     applied. Patches are under the same license as the files that they modify
     in the original package.
     Note: Buildroot applies additional patches to Libtool scripts of
     autotools-based packages. These patches can be found under
     support/libtool in the Buildroot source and, due to technical
     limitations, are not saved with the package sources. You may need
     to collect them manually.
   * A manifest file listing the configured packages and related information.
   * The license text of the packages; they have been saved in the licenses/
     subdirectory.