gnome-desktop: Now we depend on gnome-common-native, use the correct sysroot
This fixes the build after gnomebase was changed to depend on
gnome-common-native.
(From OE-Core rev: 390c3bfc6baefc0d6bebcfb6d57eb9baa6fefb40)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>