Upgraded lwIP to 2.0.2-STABLE

ext/lwip/src/include/arch/cc.h

@@ -36,6 +36,7 @@
 #include <string.h>
 #include <sys/time.h>
 #include <limits.h>
+#include <errno.h>
 
 #define LWIP_TIMEVAL_PRIVATE 0
 
@@ -81,7 +82,8 @@ typedef unsigned long mem_ptr_t;
 #include <stdlib.h>
 /* Plaform specific diagnostic output */
 //#define LWIP_PLATFORM_DIAG(x)	do {printf x;} while(0)
-#define LWIP_PLATFORM_DIAG(x) printf(x);
+#include "Debug.hpp"
+#define LWIP_PLATFORM_DIAG(x) DEBUG_STACK(x);
 
 #define LWIP_PLATFORM_ASSERT(x) do {printf("Assertion \"%s\" failed at line %d in %s\n", \
                                      x, __LINE__, __FILE__); fflush(NULL); abort();} while(0)