Remove time.h include from utils/includes.h

os_*() wrappers should be used instead of functions from time.h.
Removing the header from includes.h enforces this. os_unix.c can
include this its uses are valid wrapper calls. wps_upnp.c uses
gmtime() for which there is no os_*() wrapper available yet, so
allow it to use time.h, too. Similarly, allow dump_state.c to
use time.h for ctime().

hostapd/dump_state.c

@@ -13,6 +13,7 @@
  */
 
 #include "utils/includes.h"
+#include <time.h>
 
 #include "utils/common.h"
 #include "radius/radius_client.h"

src/utils/includes.h

@@ -34,7 +34,6 @@
 #include <errno.h>
 #endif /* _WIN32_WCE */
 #include <ctype.h>
-#include <time.h>
 
 #ifndef CONFIG_TI_COMPILER
 #ifndef _MSC_VER

src/utils/os_unix.c

@@ -14,6 +14,8 @@
 
 #include "includes.h"
 
+#include <time.h>
+
 #ifdef ANDROID
 #include <linux/capability.h>
 #include <linux/prctl.h>

src/wps/wps_upnp.c

@@ -172,7 +172,7 @@
 
 #include "includes.h"
 
-#include <assert.h>
+#include <time.h>
 #include <net/if.h>
 #include <netdb.h>
 #include <sys/ioctl.h>