Log Message:
xclock: update to 1.0.9.

Alan Coopersmith (3):
      Use _CONST_X_STRING to make libXt declare String as const char *
      Clear -Wsign-compare warning from gcc 7.3
      xclock 1.0.9

Jon Turney (1):
      Consistently use X_GETTIMEOFDAY

Niclas Zeising (2):
      Fix logic sourrouning && and ||
      Use fabsf when dealing with floating point numbers