Update layers/poky digest to 3930645 #3938

Job	Run time
Get inputs	2s
Yocto / Approved commit	3s
Yocto / Device info	55s
Yocto / Source mirror IAM role	5s
Yocto / Build	1h 28m 4s
Yocto / Test (hup, balena-cloud.com, ubuntu-latest, testbot)	1h 0m 40s
Yocto / Test (cloud, balena-cloud.com, ubuntu-latest, testbot)	6h 0m 41s
Yocto / Test (os, balena-cloud.com, ubuntu-latest, testbot)	5h 11m 13s
Yocto / Deploy AMI	0s
Yocto / Deploy to S3	-1s
Yocto / Deploy hostApp	-1s
Yocto / All jobs (raspberrypi0-2w-64, balena-cloud.com)	4s
	13h 41m 45s

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