Update the files which contain no license information with the
'Apache-2.0' SPDX license identifier. Many source files in the tree are
missing licensing information, which makes it harder for compliance
tools to determine the correct license.
By default all files without license information are under the default
license of Zephyr, which is Apache version 2.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Added a CMake extention for determining if a directory is write-able
by the build system. To determine this, we attempt to 'touch' a file
in the directory and check the return code of this command.
Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>
Anas Nashif