[Toybox] sort -V test?

[Rob Landley]

Following up in the "promote more tests" todo item...

Back when I implemented sort -V, it passed the tests on the host. But since then
I've switched off of Ubuntu (because they end of lifed the last version without
systemd) to Devuan, and the -rc and -pre stuff in test_sort is backwards now:

echo -ne
'toy-3.12.tar.gz\ntoy-2.37.tar.gz\ntoy-3.4.tar.gz\ntoy-4.16-rc2.tar.gz\ntoy-4.16.tar.gz'
| sort -V
--- expected	2020-10-14 19:06:53.480009835 -0500
+++ actual	2020-10-14 19:06:53.480009835 -0500
@@ -1,5 +1,5 @@
 toy-2.37.tar.gz
 toy-3.4.tar.gz
 toy-3.12.tar.gz
-toy-4.16-rc2.tar.gz
 toy-4.16.tar.gz
+toy-4.16-rc2.tar.gz

I don't know if this is because of a version upgrade, or downgrade, or what?
(LANG=c doesn't change it.) Logically the -rc goes before the final release,
it's an earlier version. But that's not what sort -V in devuan is saying.
(According to --version i's gnu/gnu/gnu coreutils 8.26 from 2016, I implemented
it in 2018. So is it older or newer than the one I tested against at the time?)

I pulled up my old Ubuntu 0804 image to see what an OLD one would do, but the
sort in that doesn't know -V exists. (<coulson>So that's what it
does.</coulson>) And the Fedora image I installed a while back only booted the
first time because qemu does this "you gave me a file to use as a hard drive but
it's dangerous not to SAY it's a file to use as a hard drive with the
extra-secret handshake so let's silently discard writes to the boot sector so
whatever you install to it doesn't work, because obviously writing to every
OTHER sector of the disk is NOT dangerous in any way! Heck, dd the whole thing
with zeroes as long as you save that all-important block 0." Thanks for the
"upgrade", QEMU devs! (And if you delete the multi-gigabyte iso you downloaded
before noticing, and are on an airplane, it's a bit of a pain.)

Anyway, TEST_HOST changed in sort.tests and I dunno if I should change toybox or
just blame coreutils for being inconsistent? There's no spec, this is a feature
the gnu devs hallucinated up without particularly documenting it that I can find...

Rob