qcap: video_open add O_CLOEXEC flag let child process without inherit handles

[Andrew Eikum]

Signed-off-by: Andrew Eikum <aeikum at codeweavers.com>

On Thu, Feb 09, 2017 at 03:12:19PM +0800, 谢威 wrote:
> Can't re-open the device if child process inherit the handle
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