tests: Make ClockObject test a little laxer again

This failed on the Windows builder because apparently time.sleep is apparently not super precise on Windows.

tests/putil/test_clockobject.py

@@ -16,13 +16,13 @@ def test_clock_jump_frame_time(clockobj):
 def test_clock_get_real_time(clockobj):
     current_time = clockobj.get_real_time()
     time.sleep(0.4)
-    assert clockobj.get_real_time() - current_time >= 0.4
+    assert clockobj.get_real_time() - current_time >= 0.39
 
 
 def test_clock_get_long_time(clockobj):
     current_time = clockobj.get_long_time()
     time.sleep(0.4)
-    assert clockobj.get_long_time() - current_time >= 0.4
+    assert clockobj.get_long_time() - current_time >= 0.39
 
 
 def test_clock_get_dt(clockobj):