IMAGE_LINGUAS_COMPLEMENTARY: auto-add language packages other than locales

IMAGE_LINGUAS_COMPLEMENTARY: auto-add language packages other than locales

This change allows layers adding packages other than locales automatically to
images based on languages selected in IMAGE_LINGUAS.

E.g if a layer has recipes creating packages as:
| ${PN}-foo-en / ${PN}-foo-de / ${PN}-foo-it / ..

it would set
| IMAGE_LINGUAS_COMPLEMENTARY_append = " *-foo-%s"

in its layer.conf to enable auto-adding.

Signed-off-by: Andreas Müller <schnitzeltony@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>