As a current workaround we need to wait some time after publishing a
mavlink log message in order for it to arrive in QGC.

Without this wait, we end up saving the old parameters on Snapdragon.

This fixes the clock used for pthread_cond_timedwait properly.

It's enough to have the check_submodules.sh script. The rest needs to
go.

This fixes a bug that the mainapp on Snapdragon uses 100% CPU.

remove debug output

The accel calibration sometimes lead to a crash. Raising the stack size
resolved the issue.

support recent change in ekf2 module which made it only publish the output
when an ekf update was occuring. in case the ekf2 module does not update
the replay module will be informed and will thus not wait for an update
but continue preparing the next sample of sensor data