f2fs-base: update upstream to 19/06

Signed-off-by: Alejandro Martinez Ruiz <alex@nowcomputing.com>
f2fs-for-3.5: adjust to latest upstream and add VM_CAN_NONLINEAR support

Signed-off-by: Alejandro Martinez Ruiz <alex@nowcomputing.com>
f2fs-for-3.2: adjust contexts

Signed-off-by: Alejandro Martinez Ruiz <alex@nowcomputing.com>
f2fs-for-3.2: add new patch needed due to recent upstream changes

Signed-off-by: Alejandro Martinez Ruiz <alex@nowcomputing.com>
f2fs-for-3.2: modify patch 0004 due to recent upstream changes

Signed-off-by: Alejandro Martinez Ruiz <alex@nowcomputing.com>
f2fs-for-3.0: adjust contexts

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