meta-acrn 1.0.1 dunfell-3.1

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New Features / Enhancements

linux-intel-rt-acrn-uos (Preempt RT): add 5.4 kernel

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Updates/Upgrades

doc: update for linuxt-intel 5.4 preempt RT support
acrn: upgrade to 1.6.1
linux-intel-acrn: bump to 5.4.39
linux-intel-acrn : bump to 4.19.120

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Fixes

acrn-demo-uos: remove maxcpus=1
travis.yml: switch to Ubuntu 18.04 on Travis CI