Add Long File Name (VFAT) entry to the Mass Storage class bootloader, so that systems such as Linux that load a VFAT filesystem driver instead of the legacy MSDOS filesystem do not corrupt the volume by trying to write a LFN entry.

git-svn-id: http://lufa-lib.googlecode.com/svn/trunk@2662 d5102386-fcda-11dd-9fdb-3debd5008f28
Clean up the Mass Storage bootloader virtual FAT directory entry definitions.

git-svn-id: http://lufa-lib.googlecode.com/svn/trunk@2663 d5102386-fcda-11dd-9fdb-3debd5008f28