jewel: Use by-name partitions in fstab

* Also change encryption to use the 'extra' partition.
* Also remove recovery specific fstab.

Change-Id: I68ed1aaa1d8b0a74b8eb16093d2f2a028b687ccb
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_htc_jewel into cd-4.4