POSIX2008 demands that `stat` contains an `st_mtim` field of type `timespec`.
That field holds modification time with a nanosecond resolution.
VxWorks reports _POSIX_VERSION as 200112.
The `stat` struct does not contain `st_mtim`, but rather an `st_mtime` which
holds a `time_t` which contains seconds.
Because of that, when the test creates and modifies a file within one
second, the polling watcher does not detect any changes.
Fix the problem by postponing the watcher by 1s.
Pick-to: 6.7
Task-number: QTBUG-115777
Change-Id: Idfc1d7b2e111967a42c93c0adaffaa7d28ee20a7
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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