Unlike the previous code, we now entrust the compiler to properly
implement thread-safe statics for this code. That was the main reason
why the old code was confusing, trying to determine if the clock IDs
were positive or negative.
Instead, simply make a call to clock_getres(CLOCK_MONOTONIC) and that
will tell us if the monotonic clock is supported.
Change-Id: I0031aa609e714ae983c3fffd1469522a68fa3b66
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
8c8cbd1508