bfs: Use the QueryParserUtils instead of its own copy.

* Ingo copied the methods into a shared location, and then obviously
  "forgot" to let BFS use them. As a side note for Ingo: the complete
  error GCC reported was "std::fssh_size_t" not defined with the macro
  wrapper as code location. The actual problem was a "using std::size_t"
  in some C++ header that accidentally got included after the wrapper.
* The shared Query code is not yet used. That'll be done another time.
* Renamed BFS_SHELL define to FS_SHELL, such that QueryParserUtils can be
  used in any file system shell, not just the bfs_shell.

headers/private/file_systems/QueryParserUtils.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2001-2009, Axel Dörfler, [email protected].
+ * Copyright 2001-2014, Axel Dörfler, [email protected].
  * Copyright 2010, Clemens Zeidler <[email protected]>
  * Copyright 2011, Ingo Weinhold, [email protected].
  * This file may be used under the terms of the MIT License.
@@ -8,9 +8,17 @@
 #define _FILE_SYSTEMS_QUERY_PARSER_UTILS_H
 
 
-#include <sys/cdefs.h>
+#ifdef FS_SHELL
+#	include <new>
+
+#	include "fssh_api_wrapper.h"
+#	include "fssh_auto_deleter.h"
+#else
+#	include <sys/cdefs.h>
+
+#	include <SupportDefs.h>
+#endif	// !FS_SHELL
 
-#include <SupportDefs.h>
 
 
 namespace QueryParser {