qa/370: change uname use
qa/370: change uname use

Change from uname -p (which sometimes returns "unknown", especially
on VMs) to uname -m.

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp