Add JOYSTICK_SERIAL_OUT system for outputting joystick data #430

Job	Run time
build (hw1, 3do)	2m 47s
build (hw1, cdi)	2m 41s
build (hw1, dreamcast)	2m 39s
build (hw1, gamecube)	2m 46s
build (hw1, gbahd)	2m 47s
build (hw1, genesis)	2m 36s
build (hw1, jaguar)	2m 35s
build (hw1, jvs_arcade)	2m 36s
build (hw1, n64)	2m 43s
build (hw1, nes)	2m 37s
build (hw1, parallel_1p)	2m 43s
build (hw1, parallel_1p_3v3)	2m 41s
build (hw1, parallel_2p)	2m 37s
build (hw1, parallel_2p_3v3)	2m 38s
build (hw1, pc_engine)	2m 40s
build (hw1, pcfx)	2m 40s
build (hw1, playstation)	1s
build (hw1, saturn)	2s
build (hw1, snes)	1s
build (hw1, universal)	1s
build (hw1, virtualboy)	1s
build (hw1, wii_extension)	1s
build (hw2, 3do)	1s
build (hw2, cdi)	1s
build (hw2, dreamcast)	1s
build (hw2, gamecube)	1s
build (hw2, gbahd)	1s
build (hw2, genesis)	1s
build (hw2, jaguar)	1s
build (hw2, jvs_arcade)	1s
build (hw2, n64)	1s
build (hw2, nes)	1s
build (hw2, parallel_1p)	1s
build (hw2, parallel_1p_3v3)	1s
build (hw2, parallel_2p)	1s
build (hw2, parallel_2p_3v3)	1s
build (hw2, pc_engine)	1s
build (hw2, pcfx)	1s
build (hw2, playstation)	1s
build (hw2, saturn)	1s
build (hw2, snes)	1s
build (hw2, universal)	1s
build (hw2, virtualboy)	1s
build (hw2, wii_extension)	1s
build (dbg, pad_test)	2m 46s
build (dbg, qemu)	2m 38s
build (dbg, qemu_bt_trace_replay)	2m 38s
build (dbg, qemu_bt_trace_replay_test)	2m 39s
	53m 56s

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