tests: Wait for just over 1 sec when testing RTC.

Waiting for 1000ms between seconds of RTC is sometimes too quick.
Waiting for 1001ms is enough for the RTC to pass 1 second.

tests/pyb/rtc.py

@@ -6,7 +6,7 @@ print(rtc)
 
 # make sure that 1 second passes correctly
 rtc.datetime((2014, 1, 1, 1, 0, 0, 0, 0))
-pyb.delay(1000)
+pyb.delay(1001)
 print(rtc.datetime()[:7])
 
 def set_and_print(datetime):