[fastfat_new]

[fastfat_new]
- Implement all infrastructue for constructing filenames in FCBs, and use it to build full file names. Every FCB has four names: a short upcased name in ANSI, a long upcased name in Unicode, a name in exact case in Unicode, and finally a full file name including all path up to the root.
- FatiQueryFileNameInformation now returns correct file name, and other places relying on presence of a correct name work now.

svn path=/trunk/; revision=43390