Merge "HAVE_POSIX_CLOCKS doesn't imply CLOCK_BOOTTIME."

nsecs_t systemTime(int clock)

{

#if defined(HAVE_POSIX_CLOCKS)

#if defined(HAVE_ANDROID_OS)

    static const clockid_t clocks[] = {

            CLOCK_REALTIME,

            CLOCK_MONOTONIC,

    clock_gettime(clocks[clock], &t);

    return nsecs_t(t.tv_sec)*1000000000LL + t.tv_nsec;

#else

    // we don't support the clocks here.

    // Clock support varies widely across hosts. Mac OS doesn't support

    // posix clocks, older glibcs don't support CLOCK_BOOTTIME and Windows

    // is windows.

    struct timeval t;

    t.tv_sec = t.tv_usec = 0;

    gettimeofday(&t, NULL);