FUSE compat: add MIME type faking

* Add special handling for reading the BEOS:TYPE attribute to supply
  on-the-fly fake MIME types for FUSE module filesystems, the same
  way it's done in our FAT and NTFS FS modules

* Reuse the mime_ext_table which we already have and put it into a
  shared location so we don't get further extra copies of it

headers/private/file_systems/mime_ext_table.h

@@ -0,0 +1,24 @@
+/*
+	Copyright 1999-2001, Be Incorporated.   All Rights Reserved.
+	This file may be used under the terms of the Be Sample Code License.
+*/
+
+#ifndef MIME_TYPES_H
+#define MIME_TYPES_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+extern const char* kAttrMimeTypeName;
+
+extern status_t set_mime(const char** mime, const char* filename);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif