[Toybox] android sitrep

[enh]

here's what's currently in use:

basename
cat
chmod
cmp
comm
cp
cut
date
dirname
du
echo
egrep
env
find
getconf
grep
head
hostname
id
ln
ls
md5sum
mkdir
mktemp
mv
od
paste
pgrep
pkill
ps
pwd
readlink
realpath
rm
rmdir
sed
setsid
sha1sum/sha256sum/sha512sum
sleep
sort
stat
tail
tar
tee
touch
true
truncate
uname
uniq
unix2dos
wc
which
whoami
xargs
xxd

the recent switch back to toybox xargs (including for the separate
kernel builds, that are trying to become hermetic too) seems to have
stuck.

i moved realpath over this week after realizing that -s and
--relative-to aren't actually used in the build proper; they're used
by tools that folks run locally. it's early days, but hopefully
that'll stick too.

so what's left?

dd - i've tested with the current toybox dd, and everything seems
fine, but it's still in pending/.
diff - in pending, and a few missing options. i haven't bothered
working on those in my spare time because there's always been
something closer to being finished.
expr - in pending; needs unary + but seems likely to be completely rewritten?
fuser - unwritten.
getopt - in pending.
gzip - erm, not sure how i missed this one actually... investigating
whether there's anything left to do for gzip seems like a good
non-disruptive way to spend the last working afternoon of the year :-)
hexdump - unwritten.
lsof - in pending (but since this is for human consumption and only
run on failure, i might just do this anyway).
patch - i sent out a patch earlier this morning that seems to be
sufficient, so i'll look at switching that over first thing next year.
pstree - unwritten.
tr - i've tested with the current toybox tr, and everything seems
fine, but it's still in pending/.

unrelated, i'll send my readelf this weekend, and i'll try to at least
get my hexedit changes sent out over the break too...