frsky telem: reduce stack, fix missing header
Use smaller logging buffer
FMUv1: Reduce user main stack slightly, still 2.5K buffer between actual use and size
gps driver: Use correct spawn command, use a smaller start tool size
flow example: Use smaller stack and correct start logic
mavlink app: Reduce stack sizes minimally after further inspection
inav: Reduce stack size of start tool
inav: Fix scheduling type, we want ALL processes to stick to DEFAULT
nshterm: Reduce stack size further after more thorough inspection
Merge pull request #965 from PX4/stack_fixes

Stack fixes