Rename SPL06 to SPx06 #39460

Job	Run time
build (base)	7m 42s
build-gcc-heli	7m 25s
build (clang)	8m 31s
autotest (sitltest-copter-tests1a)	10m 19s
autotest (sitltest-copter-tests1b)	12m 18s
autotest (sitltest-copter-tests1c)	14m 13s
autotest (sitltest-copter-tests1d)	12m 16s
autotest (sitltest-copter-tests1e)	11m 56s
autotest (sitltest-copter-tests2a)	11m 53s
autotest (sitltest-copter-tests2b)	32m 34s
autotest-heli (sitltest-heli)	12m 42s
	2h 21m 49s

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