support aliyun sdk on TencentOS tiny

sample: examples\aliyun_iotkit_csdk_mqtt
project: board\TencentOS_tiny_EVB_MX_Plus\KEIL\aliyun_iotkit_csdk_mqtt

components/connectivity/iotkit-embedded-3.0.1/3rdparty/external_libs/nghttp2/nghttp2_debug.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2015-2018 Alibaba Group Holding Limited
+ */
+
+
+#ifndef NGHTTP2_DEBUG_H
+#define NGHTTP2_DEBUG_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include "nghttp2.h"
+
+#ifdef DEBUGBUILD
+#define DEBUGF(...) nghttp2_debug_vprintf(__VA_ARGS__)
+void nghttp2_debug_vprintf(const char *format, ...);
+#else
+#define DEBUGF(...)                                                            \
+  do {                                                                         \
+  } while (0)
+#endif
+
+#endif /* NGHTTP2_DEBUG_H */