TWRPify: Add parts to build TWRP

Change-Id: I02d1765178dd1b43cf180342a34e3a7c98475bf2
remove SKIP_SET_METADATA board flag.

 This is no longer needed with new TWRP recovery

Change-Id: I9f1e06a4fcde28c71854e18ac369a7d93da142f8
fstab: add length parameter and tweak flags for encryption

Change-Id: I9d3897ae38cfc56ada4edc3697ed5a6dae7bd2aa
fstab: add length parameter for recovery encryption support

Change-Id: Iad3a80f8de4e7ed48472bbae824c2942307bbb2c
TWRP: pkace all recovery files in /recovery/root instead of /root

Change-Id: I42bc6dcce05a7866c0ec25da631bb0ad8532b629
Merge branch 'cm-11.0' of https://github.com/jrior001/android_device_htc_ace into cm-11.0