feat(newlib): Update newlib library and header file

components/newlib/newlib/README

@@ -2,4 +2,4 @@ README
 
 Information of newlib is following:
 
-commit: 19df868f
+commit: 1fc9ee20

components/newlib/newlib/include/newlib.h

@@ -69,7 +69,7 @@
 /* #undef _UINTPTR_EQ_ULONGLONG */
 
 /* Define if ivo supported in streamio.  */
-/* #undef _FVWRITE_IN_STREAMIO */
+#define _FVWRITE_IN_STREAMIO 1
 
 /* Define if fseek functions support seek optimization.  */
 #define _FSEEK_OPTIMIZATION 1

components/newlib/newlib/port/fputc.c

@@ -1,26 +0,0 @@
-// Copyright 2018-2019 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.
-
-#include <_ansi.h>
-#include <stdio.h>
-
-int _fputc_r(struct _reent *ptr, int ch, FILE *fp)
-{
-    return fp->_write(ptr, fp->_cookie, (char *)&ch, 1);
-}
-
-int fputc(int ch, FILE *fp)
-{
-    return _fputc_r (_REENT, ch, fp);
-}