Add tests for Linux timers: CLOCK_REALTIME CLOCK_REALTIME_COARSE CLOCK_MONOTONIC CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC_RAW
Add tests for Linux timers:
CLOCK_REALTIME
CLOCK_REALTIME_COARSE
CLOCK_MONOTONIC
CLOCK_MONOTONIC_COARSE
CLOCK_MONOTONIC_RAW

chronoxor/CppBenchmark,chronoxor/CppBenchmark