tests: fix up pure case of test-sqlitestore.t
This is clearly what the line should read based on the "force to zlib"
section below, so I'm guessing it just got overlooked during development.
Differential Revision: https://phab.mercurial-scm.org/D5151
$ echo "[extensions]" >> $HGRCPATH
$ echo "mq=" >> $HGRCPATH
$ hg init
$ echo 'base' > base
$ hg ci -Ambase
adding base
$ hg qnew -mmqbase mqbase
$ hg qsave
$ hg qrestore 2
restoring status: hg patches saved state