mbedtls: Update to upstream version 2.12.0

_WIN32_WINNT redefinition fix is no longer needed as it was merged
upstream. PR 1453 is still not merged, diff updated to current state.

thirdparty/mbedtls/library/entropy_poll.c

@@ -19,19 +19,25 @@
  *  This file is part of mbed TLS (https://tls.mbed.org)
  */
 
+#if defined(__linux__)
+/* Ensure that syscall() is available even when compiling with -std=c99 */
+#define _GNU_SOURCE
+#endif
+
 #if !defined(MBEDTLS_CONFIG_FILE)
 #include "mbedtls/config.h"
 #else
 #include MBEDTLS_CONFIG_FILE
 #endif
 
+#include <string.h>
+
 #if defined(MBEDTLS_ENTROPY_C)
 
 #include "mbedtls/entropy.h"
 #include "mbedtls/entropy_poll.h"
 
 #if defined(MBEDTLS_TIMING_C)
-#include <string.h>
 #include "mbedtls/timing.h"
 #endif
 #if defined(MBEDTLS_HAVEGE_C)
@@ -44,7 +50,8 @@
 #if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
 
 #if !defined(unix) && !defined(__unix__) && !defined(__unix) && \
-    !defined(__APPLE__) && !defined(_WIN32) && !defined(__QNXNTO__)
+    !defined(__APPLE__) && !defined(_WIN32) && !defined(__QNXNTO__) && \
+    !defined(__HAIKU__)
 #error "Platform entropy sources only work on Unix and Windows, see MBEDTLS_NO_PLATFORM_ENTROPY in config.h"
 #endif