Taking over maintenance of the shadow recipe. Cleaning it up in
preparation of adding a -native version that will be used to add
users/groups during preinstall.
(From OE-Core rev: 254ca8c1667b8d35914555714239a09bfb4f43be)
Signed-off-by: Scott Garman <scott.a.garman@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>