oe/utils: filter license packages

oe/utils: filter license packages

The packages_filter_out_system() function is used in PACKAGESPLITFUNCS
to filter out "system" packages (-dbg, -dev). The filtered packages
should include license packages (-lic) as well, when they are generated
with LICENSE_CREATE_PACKAGE = "1", otherwise the license packages will
get pulled into images unintentionally.

Signed-off-by: Samuli Piippo <samuli.piippo@qt.io>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>