Modified cmake to use STACK_MAX and STACK_MAIN

Looked over the reported sitl failure with jenkins, but it shows all tests passed, and this is happening on all branches, so going to merge.

Added config for dji matrice 100.

This fixes an issue where topics where not subscribed to on the Linux
side on Snapdragon. It's a hack until there is a proper fix for the
orb_exists() call.

Improved recovery from bad height estimation

A low battery check was recently added to the preflight check, therefore
we need to pass on the information about the battery.