[autotest] Up |num| from 7 to 11 for network3g.

There are now 11 distinct HostSpecs so we need 11 machines.

TEST=None
BUG=None

Change-Id: I758ad9679651c682250690e623bc8058056ac784
Reviewed-on: https://gerrit.chromium.org/gerrit/36930
Commit-Ready: Alex Miller <milleral@chromium.org>
Reviewed-by: Alex Miller <milleral@chromium.org>
Tested-by: Alex Miller <milleral@chromium.org>
1 file changed