[fuchsia] avoid masking bits passed to FDIO

We can do our masking later, avoiding violating FDIO's assumptions.

Change-Id: Ia28b74b9d7fadae6512af51df18e39935e3e90d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1697140
Reviewed-by: James Robinson <[email protected]>
Reviewed-by: Sergey Ulanov <[email protected]>
Commit-Queue: Fabrice de Gans-Riberi <[email protected]>
Cr-Commit-Position: refs/heads/master@{#676612}
1 file changed