Makefile: Bump linuxkit to version 1.5.3 #2718

Job	Run time
packages (arm64-secure, arm64)	10m 5s
packages (ubuntu-20.04, amd64)	4m 27s
packages (ubuntu-latest, riscv64)	1m 5s
manifest	1m 29s
eve (arm64, kvm)	45m 11s
eve (arm64, xen)	37m 50s
eve (amd64, kvm)	28m 58s
eve (amd64, xen)	33m 15s
eve (riscv64, mini)	2m 14s
trigger_assets	0s
	2h 44m 34s

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