GitLab

In the near future zx_port_{wait,queue} will not accept a count of zero.
Change all callers to call these functions with a count of one.

Change-Id: I1a3fbcbb051c1da674fd6080685abd8c26067170
Reviewed-on: https://chromium-review.googlesource.com/1015481
Commit-Queue: Garret Kelly <gdk@chromium.org>
Reviewed-by: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551415}