Timeval: Move implementation to use clock_gettime and timespec

According to gettimeofday manual:
"Applications should use the clock_gettime() function instead of the
obsolescent gettimeofday() function."

Furthermore, it may be desirable in the future to use other clocks such
as monotonic.

Change-Id: I2286998c5eefbf3c3dfb105c223daec7a1083803
2 files changed