Merge "Improved/clarified license guidance for GPL code." into mnc-dev

#$(error filtered out

#           $(filter-out $(modules_to_install),$(old_modules_to_install)))

# Don't include any GNU targets in the SDK.  It's ok (and necessary)

# to build the host tools, but nothing that's going to be installed

# on the target (including static libraries).

# Don't include any GNU General Public License shared objects or static

# libraries in SDK images.  GPL executables (not static/dynamic libraries)

# are okay if they don't link against any closed source libraries (directly

# or indirectly)

# It's ok (and necessary) to build the host tools, but nothing that's

# going to be installed on the target (including static libraries).

ifdef is_sdk_build

  target_gnu_MODULES := \

              $(filter \