Change the physical machine policy test to Arch
Change the physical machine policy test to Arch

The collected gLinux workstation event log has issues where the firmware
extends a separator event (four 0x00 bytes) into PCR0, using
EV_S_CRTM_CONTENTS.
This conflicts with the logic that checks for separator events using
only the event data (and ignoring the untrustworthy event type).

google/go-tpm-tools,google/go-tpm-tools,google/go-tpm-tools