Fix building with new kernel headers.

net_tstamp.h in recent kernel versions requires time.h for clockid_t.

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>

clock.c

@@ -17,11 +17,11 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 #include <errno.h>
+#include <time.h>
 #include <linux/net_tstamp.h>
 #include <poll.h>
 #include <stdlib.h>
 #include <string.h>
-#include <time.h>
 #include <sys/queue.h>
 
 #include "address.h"

sk.c

@@ -18,6 +18,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 #include <errno.h>
+#include <time.h>
 #include <linux/net_tstamp.h>
 #include <linux/sockios.h>
 #include <linux/ethtool.h>

timemaster.c

@@ -22,6 +22,7 @@
 #include <errno.h>
 #include <libgen.h>
 #include <limits.h>
+#include <time.h>
 #include <linux/net_tstamp.h>
 #include <net/if.h>
 #include <signal.h>