Fix warning
Merge branch 'os_dev' of https://github.com/moon-bear/firmware into os_dev
Use attribute to block the free function
Merge pull request #150 from shengwen1997/os_dev

Fix warning
Use FreeRTOS ISR routine to handle GPS message
Disable navgiation bind to pid_nav temperioly
Merge branch 'os_dev' of https://github.com/moon-bear/firmware into os_dev
Merge branch 'os_dev' into navigation_dev
After "done", quadrotor should go next waypoint or hold here
Broadcast nav message through mavlink STATUSTEXT msg