bench: fix compilation on hurd
Patch by Samuel Thibault.
https://github.com/xkbcommon/libxkbcommon/issues/39
Signed-off-by: Ran Benita <ran234@gmail.com>
bench: Modify benchmarks for a wider range of platforms
- Add the new files bench.c and bench.h to implement a timer module.
- Implement the module with clock_gettime(), mach_absolute_time(), or
gettimeofday(), depending on a given platform.
- Replace the time measurement code of the benchmark programs with the
functions of the module.