fix compatibility with systemd 255 handle systemd-pcr{phase -> extend} rename
See https://github.com/dracutdevs/dracut/issues/2583
Describe the bug With the systemd version 255, the systemd-pcrphase binary was renamed to systemd-pcrextend, breaking dracut initrds requiring it.
Distribution used Arch linux
Dracut version dracut 059
Init system systemd
Edited by Laszlo Gombos