It makes more sense to set the optimization flags on a platform basis
instead of individually for each module. This allows for different
optimization options for SITL, NuttX, Snapdragon, etc.

This fixes a corner case where the first advertise/publish of a
vehicle_command_ack was missed. What happened was that the
orb_subscribe_multi was not called until the topic had been published
and therefore orb_exists was happy. This means that by the time
orb_subscribe_multi was finally called, the first vehicle_command_ack
was already history and not detected by orb_check.

This changed adds a flag to the MavlinkOrbSubscription which tells it to
subscribe to a topic from the beginning.

- deploy all branches to s3

now the files are equal

DF Update: Use common CMake version so Darwin handling is correct in PX4

Update DF to use proper constants

Update DF

Output CMake version

Code style fix

-the previous item altitude wasn't valid if switching from LOITER ->
MISSION
-fixes #5395