Support f2fs format

This allows devices like Moto X, which have f2fs formated
data partition to be used with CWM recovery. Format data
works as enteded as well as backup/restore.

Change-Id: I8b56252cc462c9e9ff2824bc817ea00ddd4ccacc
Bump to 6.0.3.9

Change-Id: I5637e796e4dc65ae527b0b1984b295d69ccc0707
Merge remote-tracking branch 'cm10.2/cm-10.2' into cm-10.2