In this context, recipe "type" refers to whether it is 'target', 'native',
'cross', etc. COPYLEFT_RECIPE_TYPES is a space separated list of types to
include. It defaults to 'target'.
(From OE-Core rev: 045e8a409ffe23d4f562b2982bfeee6e45f3c0d9)
Signed-off-by: Christopher Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>