posix: upgrade libevent from 1.4.7 to 1.4.13

third_party/libevent/test/test-time.c

 /*
  * Compile with:
  * cc -I/usr/local/include -o time-test time-test.c -L/usr/local/lib -levent
  */
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
+#ifdef WIN32
+#include <winsock2.h>
+#endif
 
 #include <sys/types.h>
 #include <sys/stat.h>
+#ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
+#endif
 #include <fcntl.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
 #include <errno.h>
 
 #include <event.h>
 
 int called = 0;
 
 #define NEVENT  20000
 
 struct event *ev[NEVENT];
 
@@ skipping 45 matching lines @@
                 tv.tv_sec = 0;
                 tv.tv_usec = rand_int(50000);
                 evtimer_add(ev[i], &tv);
         }
 
         event_dispatch();
 
         return (called < NEVENT);
 }