Don't specify any argument to the split() function when handling changes
to list type variables (e.g. PACKAGES) so that the values are split by
any whitespace and only split once for a block of multiple whitespace
characters.
(From OE-Core rev: 15ad5d2c0e92fefdbb7c0cf064134b1cabfd84ac)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>