Bug#819207: new name: "arch-test"

[Adam Borowski <kilobyte@angband.pl>]

I do consider archdetect.udeb misnamed, as it doesn't deal with "arch"s in
Debian sense at all -- even its sources say "subarch" everywhere.  Elsewhere
the name used is "flavour".

However, it was first.

Thus, I think I'll go with "arch-test".  Enumerating architectures is
something only humans will do for sysinfo reasons, other software will
likely call arch-detect/arch-test to query a single given architecture,
so "test" should be good.

-- 
A tit a day keeps the vet away.