Decrease free space required for autotest

Not sure why autotest needs so much space, during a locally run bvt test,
the space used only increased by a few mb.

Changing the value to 700MB so rialto barely passes.

TEST=Rialto now repairs successfully
BUG=chrome-os-partner:45875

Change-Id: Ife2a6b005c2068108be3f3ee5ef8ece779241748
Signed-off-by: Alexandru M Stan <amstan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/302732
Commit-Ready: Alexandru Stan <amstan@chromium.org>
Tested-by: Alexandru Stan <amstan@chromium.org>
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
1 file changed