Plane: prepare for 4.4.0 #3202

Job	Run time
build (base)	8m 34s
build (clang)	8m 20s
build-gcc-heli	8m 46s
autotest (sitltest-copter-tests1a)	18m 22s
autotest (sitltest-copter-tests1b)	20m 12s
autotest (sitltest-copter-tests1c)	14m 40s
autotest (sitltest-copter-tests1d)	15m 10s
autotest (sitltest-copter-tests1e)	16m 5s
autotest (sitltest-copter-tests2a)	16m 15s
autotest (sitltest-copter-tests2b)	32m 15s
autotest-heli (sitltest-heli)	16m 49s
	2h 55m 28s

Provide feedback