examples: add missing includes

thread.h
    gnrc/netif.h

examples/cord_epsim/main.c

@@ -24,6 +24,7 @@
 #include "net/gcoap.h"
 #include "net/cord/epsim.h"
 #include "net/cord/common.h"
+#include "net/gnrc/netif.h"
 #include "net/sock/util.h"
 #include "net/ipv6/addr.h"
 #include "xtimer.h"

examples/cord_lc/cord_lc_cli.c

@@ -23,6 +23,7 @@
 
 #include "net/cord/config.h"
 #include "net/cord/lc.h"
+#include "net/gnrc/netif.h"
 #include "net/gcoap.h"
 #include "net/sock/util.h"
 

examples/dtls-echo/dtls-client.c

@@ -26,6 +26,7 @@
 #include <inttypes.h>
 
 #include "timex.h"
+#include "net/gnrc/netif.h"
 #include "net/sock/udp.h"
 #include "tinydtls_keys.h"
 

examples/dtls-sock/dtls-client.c

@@ -20,6 +20,7 @@
 
 #include "kernel_defines.h"
 
+#include "net/gnrc/netif.h"
 #include "net/sock/udp.h"
 #include "net/sock/dtls.h"
 #include "net/sock/dtls/creds.h"

examples/dtls-wolfssl/dtls-client.c

@@ -26,6 +26,7 @@
 #include <stdlib.h>
 #include <string.h>
 
+#include "net/gnrc/netif.h"
 #include "log.h"
 
 #define SERVER_PORT 11111

examples/emcute_mqttsn/main.c

@@ -27,6 +27,7 @@
 #include "msg.h"
 #include "net/emcute.h"
 #include "net/ipv6/addr.h"
+#include "thread.h"
 
 #ifndef EMCUTE_ID
 #define EMCUTE_ID           ("gertrud")