Add platform config for selecting AMD/Intel host #1149

Job	Run time
lint	39s
tool	41s
tool (--no-default-features --features="redox_hwio")	40s
ec (arduino/mega2560)	31s
ec (arduino/micro)	30s
ec (arduino/uno)	39s
ec (system76/addw1)	40s
ec (system76/addw2)	41s
ec (system76/addw3)	1m 16s
ec (system76/addw4)	3m 11s
ec (system76/bonw14)	1m 38s
ec (system76/bonw15-b)	33s
ec (system76/bonw15)	3m 9s
ec (system76/darp10-b)	33s
ec (system76/darp10)	2m 36s
ec (system76/darp5)	44s
ec (system76/darp6)	34s
ec (system76/darp7)	49s
ec (system76/darp8)	35s
ec (system76/darp9)	40s
ec (system76/galp3-c)	41s
ec (system76/galp4)	1m 41s
ec (system76/galp5)	3m 17s
ec (system76/galp6)	46s
ec (system76/galp7)	1m 39s
ec (system76/gaze15)	1m 35s
ec (system76/gaze16-3050)	3m 21s
ec (system76/gaze16-3060-b)	3m 0s
ec (system76/gaze16-3060)	3m 7s
ec (system76/gaze17-3050)	44s
ec (system76/gaze17-3060-b)	39s
ec (system76/gaze17-3060)	40s
ec (system76/gaze18)	35s
ec (system76/lemp10)	42s
ec (system76/lemp11)	37s
ec (system76/lemp12)	40s
ec (system76/lemp13-b)	40s
ec (system76/lemp13)	39s
ec (system76/lemp9)	32s
ec (system76/oryp10)	41s
ec (system76/oryp11)	3m 9s
ec (system76/oryp12)	34s
ec (system76/oryp5)	42s
ec (system76/oryp6)	1m 41s
ec (system76/oryp7)	40s
ec (system76/oryp8)	32s
ec (system76/oryp9)	3m 20s
ec (system76/serw13)	41s
	58m 54s

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