selftests/timers: Add set-tai from the timetest suite

This patch adds the set-tai test which ensures the tai offset
can be set properly from adjtimex.

Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Tested-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile
index d733324..7e2fba7 100644
--- a/tools/testing/selftests/timers/Makefile
+++ b/tools/testing/selftests/timers/Makefile
@@ -5,7 +5,7 @@
 bins = posix_timers nanosleep inconsistency-check nsleep-lat raw_skew \
 	set-timer-lat threadtest mqueue-lat valid-adjtimex \
 	alarmtimer-suspend change_skew skew_consistency clocksource-switch \
-	leap-a-day leapcrash
+	leap-a-day leapcrash set-tai
 
 all: ${bins}
 
@@ -32,6 +32,7 @@
 	./clocksource-switch
 	./leap-a-day -s -i 10
 	./leapcrash
+	./set-tai
 
 clean:
 	rm -f ${bins}