The test checks that the creation time equals the birth time on systems
that support the notion of birth time (macOS, Linux.)
The test was flaky because there was a write taking place between the
creation of the file and the fstat() call, sometimes changing the ctime
by fractions of milliseconds... First fstat(), only then write().
Fixes: https://github.com/libuv/libuv/issues/2235
PR-URL: https://github.com/libuv/libuv/pull/2621
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Jameson Nash <vtjnash@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>