CI fixes #1291

Job	Run time
build (base)	4m 18s
build (clang)	4m 13s
build-gcc-heli	3m 56s
autotest-heli (sitltest-heli)	10m 35s
autotest (sitltest-copter-tests1a)	10m 33s
autotest (sitltest-copter-tests1b)	12m 29s
autotest (sitltest-copter-tests1c)	11m 1s
autotest (sitltest-copter-tests1d)	10m 34s
autotest (sitltest-copter-tests1e)	12m 10s
autotest (sitltest-copter-tests2a)	12m 52s
autotest (sitltest-copter-tests2b)	22m 47s
	1h 55m 28s

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