This cleans up most of the size-related problems in system/core.
There are still a few changes needed for a clean 64-bit build,
but they look like they might require changes to things like the
fastboot protocol.
Change-Id: I1560425a289fa158e13e2e3173cc3e71976f92c0
Some versions of windows cannot handle FAT32 filesystems with less
than 65527 clusters, so make sure we don't create such beasts.
Change-Id: Id00fb02c4f8476f7dcc0ef137bd9e4975d740591
