test-subrepo-recursion: more aggressively regex 'unzip -l' output for 10.10
The output on 10.10 looks like this:
Length Date Time Name
-------- ---- ---- ----
172 01-01-80 00:00 .hg_archival.txt
10 01-01-80 00:00 .hgsub
45 01-01-80 00:00 .hgsubstate
3 01-01-80 00:00 x.txt
10 01-01-80 00:00 foo/.hgsub
45 01-01-80 00:00 foo/.hgsubstate
9 01-01-80 00:00 foo/y.txt
9 01-01-80 00:00 foo/bar/z.txt
-------- -------
303 8 files
(2 digit year, shorter -- separators and closer columns). We don't care about
any of that, so ignore it.