cwm: Add liblog dependency

Change-Id: Ic5716e5f2c311406bc6384e63fb0f217113e6eeb
Add a recovery version variable

the releasetools want this now

Change-Id: Ibc3cdbc8f5f8022bf51479a4702d1d0d043f70a9
Merge branch 'cm-10.2' into martincz