f2fs-base: update upstream to 12/06

Signed-off-by: Alejandro Martinez Ruiz <alex@nowcomputing.com>
f2fs-for-3.0: fix context for latest upstream patches

Signed-off-by: Alejandro Martinez Ruiz <alex@nowcomputing.com>
f2fs-for-3.0: add patches to handle new xattrs code

This is done by introducing the needed prototypes instead of backporting
the f2fs code, which would probably be cleaner.

Signed-off-by: Alejandro Martinez Ruiz <alex@nowcomputing.com>