update-alternatives: We now use u-a in nativesdk so make sure the dependency is present

update-alternatives: We now use u-a in nativesdk so make sure the dependency is present

When update-alternatives was part of opkg which got built in most nativesdk
scenarios, this missing dependency wasn't an issue. We now need nativesdk-opkg-utils
so we need to ensure the dependency is present in nativesdk cases.

This avoids build failures with the recent u-a move to opkg-utils.

(From OE-Core rev: 7e0adf676da45e49287b7ce6478a6dbfd8fa117f)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>