pkg/host: test for different cpuinfo fields depending on arch
pkg/host: test for different cpuinfo fields depending on arch

Not all architectures have fields in /proc/cpuinfo for vendor, model and
flags, e.g. powerpc doesn't have an equivalent for vendor or flags.

Rather than testing for the presence of at least one field name for each
category, have a separate list per architecture.

Signed-off-by: Andrew Donnellan <44ca8c041ed925606732b2a0f30e5b73c32761a8@linux.ibm.com>

xairy/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,xairy/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller,xairy/syzkaller,google/syzkaller,google/syzkaller