zdtm: increase the amount of allowable inaccuracy

The timeout can be exceeded during dumping and restoring.
When we are testing snapshots, the test is dumped three times.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/live/static/rtc.c

@@ -11,7 +11,7 @@
 #include "zdtmtst.h"
 
 #define TEST_HZ 4
-#define NR_FAILS 5
+#define NR_FAILS 10
 
 int main(int argc, char **argv)
 {