Log Message:
p5-Time-HiRes: update to 1.9757.

1.9577 [2018-03-15]
 - fix win32 (and cygwin?) builds which have been broken since 1.9755:
   problem was that gettimeofday() is a macro and needs to stay such
 - regenerate ppport.h with Perl 5.26.1 (was previously generated with
   5.25.6) and Devel::PPPort 3.35 (previously 3.36) -- this doesn't
   change the ppport.h, though

1.9756 [2018-03-14]
 - division by zero in new test tv_interval.t [rt.cpan.org #124775]:
   made the test pass even if the difference is zero, but also
   made it practically impossible to ever be zero by adding
   a sub-second sleep.
 - remove comments from inside qw [rt.cpan.org #124777],
   only seemed to be caught by Perl 5.18.4

1.9755 [2018-03-14]
 - adjust the error messages of tv_interval()
 - the NV_1EX constants now cast to be NV so that
   tv_interval() with long double builds does not
   produce ugly results [rt.cpan.org #106456]
 - add tests for tv_interval()
 - centralize the mygettimeofday() logic
 - make the mygettimeofday() a function instead of macro
 - add the OS X 10.12+ clock_gettime() constants
   CLOCK_MONOTONIC_RAW_APPROX CLOCK_UPTIME_RAW_APPROX
 - regenerate the fallback files