inclue/sys/file.h: Dummy header for POSIX compliance

include/sys/file.h

@@ -0,0 +1,31 @@
+/********************************************************************************
+ * include/sys/file.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you 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 __INCLUDE_SYS_FILE_H
+#define __INCLUDE_SYS_FILE_H
+
+/********************************************************************************
+ * Included Files
+ ********************************************************************************/
+
+#include <unistd.h>
+#include <fcntl.h>
+
+#endif /* __INCLUDE_SYS_FILE_H */