Update IDF to 3.2-3276a13 and esptool.py to 2.5.0 (#1878)

* TX Flow Control and Code cleanup

* Use semaphore instead of delay

TX functionality is done.

* Use single buffer and empty queue on exit

* Fix compile issues because of LwIP code relocation

* Add temporary header to fix Azure not compiling

* Fix AsyncUDP early init

* AsyncUDP Multicast fixes

* Add source mac address and rework multicast

* Allow redefinition of default pins for Serials 1 and 2

* Update IDF to 3276a13

* Update esptool.py to 2.5.0

* Fix sketches

* Fix log level in BluetoothSetial

tools/sdk/include/newlib/errno.h

@@ -1,11 +1,39 @@
-#ifndef __ERRNO_H__
-#define __ERRNO_H__
 
-#ifndef __error_t_defined
-typedef int error_t;
-#define __error_t_defined 1
+// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#ifndef _ESP_PLATFORM_ERRNO_H_
+#define _ESP_PLATFORM_ERRNO_H_
+
+#include_next "errno.h"
+
+//
+// Possibly define some missing errors
+//
+#ifndef ESHUTDOWN
+#define ESHUTDOWN      108  /* Cannot send after transport endpoint shutdown */
 #endif
 
-#include <sys/errno.h>
+#ifndef EAI_SOCKTYPE
+#define	EAI_SOCKTYPE	10	/* ai_socktype not supported */
+#endif
 
-#endif /* !__ERRNO_H__ */
+#ifndef EAI_AGAIN
+#define	EAI_AGAIN	     2   /* temporary failure in name resolution */
+#endif
+
+#ifndef EAI_BADFLAGS
+#define	EAI_BADFLAGS	 3	 /* invalid value for ai_flags */
+#endif
+
+#endif // _ESP_PLATFORM_ERRNO_H_