class: bundle: rename 'incremental' image property to 'adaptive'
class: bundle: rename 'incremental' image property to 'adaptive'

While 'incremental' was the first name for the new update optimization
mode in RAUC, it will be called 'adaptive' in the RAUC 1.8 release where
it is first released with functionality behind.

Signed-off-by: Enrico Jorns <a2e5f936c390f36494e46e71bcfbe365bb1e8c49@pengutronix.de>

rauc/meta-rauc,rauc/meta-rauc,rauc/meta-rauc,rauc/meta-rauc