Add bxt_lightstyle #670

Job	Run time
rustfmt	14s
clippy - Ubuntu	54s
stable - Ubuntu - debug	1m 54s
stable - Debian (cross to Windows) - debug	1m 42s
clippy - Windows	3m 28s
stable - Ubuntu - release	2m 10s
stable - Debian (cross to Windows) - release	1m 58s
beta - Ubuntu - debug	2m 45s
beta - Debian (cross to Windows) - debug	2m 19s
stable - Windows - debug	4m 47s
stable - Windows - release	5m 58s
beta - Windows - debug	4m 44s
Publish Wiki	0s
	32m 53s

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