Some TARGET_* flags are being exported in bitbake.conf currently, so
they are impacting all the tasks of a cross-canadian recipe even they
are not in use at all.
This can lead a lot of churn when the cross-canadian sysroot are shared
by machines while they have defined different TARGET_* flags.
Fix it by overriding with BUILDSDK_* flags.
Signed-off-by: Ming Liu <peter.x.liu@external.atlascopco.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
