jf: add libCB

Change-Id: Ib66871bd31f0c036ae70fafd47cafd68ccabcae6
Revert "jf-common: mount persdata in fstab"

This reverts commit 488194d1730c2b2e9ecabf197805d5d73a8b3c18.

Change-Id: I85c43876632bdf083e2bb2fe408c43ae5bf5ab87
Merge "Revert "jf-common: mount persdata in fstab"" into cm-11.0
Merge remote-tracking branch 'upstream/cm-11.0' into cm-11.0