zdtm: posix_timers -- Add definition of CLOCK_BOOTTIME

On PI we've noticed that CLOCK_BOOTTIME might not be defined
in system headers, so ship own one.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/live/static/posix_timers.c

@@ -20,6 +20,10 @@ sigset_t mask;
 #define MAX_TIMER_DISPLACEMENT	10
 #define NO_PERIODIC
 
+#ifndef CLOCK_BOOTTIME
+# define CLOCK_BOOTTIME		7
+#endif
+
 #ifndef NO_PERIODIC
 static void realtime_periodic_handler(int sig, siginfo_t *si, void *uc);
 static void monotonic_periodic_handler(int sig, siginfo_t *si, void *uc);