Log Message:
p5-Time-HiRes: update to 1.9751.

1.9751 [2018-01-02]
 - in macOS/OSX/Darwin, use __has_builtin() check also for utimensat(),
   can cause errors like
   "HiRes.xs:1474:16: error: unrecognized platform name macOS"
   [rt.cpan.org #123994]
   (oversight from 1.9749)
 - do not define TIME_HIRES_STAT/d_hires_stat if none was found, instead
   of defining it to be zero, which case has no implementation in hrstatns()
   (thanks to Nigel Horne)
 - in t/utime.t try to divine if the filesystem of the tempfiles has been
   mounted with the 'noatime' option, which can prohibit updating the
   access time timestamp.  Also document this in HiRes.pm.
   (thanks to Nigel Horne, original analysis by Slaven Rezic)
 - synchronize the constant lists in HiRes.pm:@EXPORT_OK
   and Makefile.PL:doConstants and regenerate fallback/const-c.inc
   and fallback/const-xs.inc, this fixes Perl 5.6.2 issue with
   d_futimens not allegedly being a valid macro in t/utime.t
   (using Perl 5.26.1 for the regenerating, not 5.6.2)
   (thanks to Nigel Horne)
 - in t/utime.t define a nop sub done_testing for ancient Perls
   (like Perl 5.6.2)
 - in Perl 5.6.2 a bogus warning
   "Use of uninitialized value in subroutine entry"
   is issued from t/alarm.t: add a comment documenting that