Recent changes in bitbake mean the datastore is not always reset between
ConfigParsed and BuildStarted. This means in a fresh buiild, with memory
resident bitbake active, uninative may end up disabled.
Update the code so the enable code is always run at BuildStarted if
needed.
(From OE-Core rev: db743cc78fe5172bb4a4dac9c1dad4f5aa9e1491)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>