PACKAGECONFIG doesn't work in cross-canadian recipes at the moment as
DEPENDS are prepended with mlprefix.
A recipe is either nativesdk, native or target so adjust the if
statements accordingly, use inherits_class for more accurate recipe
classification and add cross-canadian support.
(From OE-Core rev: 4a172868a9423afb8a602413ef4935423ce51a5d)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>