posix: upgrade libevent from 1.4.7 to 1.4.13

third_party/libevent/sys-queue-macros.patch

-diff --git a/third_party/libevent/event-internal.h b/third_party/libevent/event-internal.h
-index 7485f21..93ac568 100644
---- a/event-internal.h
-+++ b/event-internal.h
-@@ -71,7 +71,7 @@ struct event_base {
- };
- 
- /* Internal use only: Functions that might be missing from <sys/queue.h> */
--#ifndef HAVE_TAILQFOREACH
-+#if !defined(HAVE_TAILQFOREACH) || defined(__QUENTIN_BUILD__)
- #define        TAILQ_FIRST(head)               ((head)->tqh_first)
- #define        TAILQ_END(head)                 NULL
- #define        TAILQ_NEXT(elm, field)          ((elm)->field.tqe_next)
-@@ -85,6 +85,9 @@ struct event_base {
-        *(listelm)->field.tqe_prev = (elm);                             \
-        (listelm)->field.tqe_prev = &(elm)->field.tqe_next;             \
- } while (0)
-+#define TAILQ_LAST(head, headname) \
-+       (*(((struct headname *)((head)->tqh_last))->tqh_last))
-+#define TAILQ_EMPTY(head)      ((head)->tqh_first == NULL)
- #endif /* TAILQ_FOREACH */
- 
- int _evsignal_set_handler(struct event_base *base, int evsignal,
-diff --git a/third_party/libevent/evrpc.c b/third_party/libevent/evrpc.c
-index 070fd9e..194cdab 100644
---- a/evrpc.c
-+++ b/evrpc.c
-@@ -55,6 +55,7 @@
- 
- #include "event.h"
- #include "evrpc.h"
-+#include "event-internal.h"
- #include "evrpc-internal.h"
- #include "evhttp.h"
- #include "evutil.h"
-diff --git a/third_party/libevent/http.c b/third_party/libevent/http.c
-index 38a89b6..8fce37a 100644
---- a/http.c
-+++ b/http.c
-@@ -88,6 +88,7 @@
- #include "evutil.h"
- #include "log.h"
- #include "http-internal.h"
-+#include "event-internal.h"
- 
- #ifdef WIN32
- #define strcasecmp _stricmp