data/media handling changes

Change-Id: Iad80acd49b325a6a01da462ce7cc5868720de286
DataManager::SetBackupFolder: allow ignore storage path vs. lenght limited zip root check

When comparing /sdcard-ext and /sdcard to the length of "/sdcard" you get the same
value and the tw_zip_location will never change.

Change-Id: I031e136b99bb31fbe6cff0bf538825d9cc2534ff
motorola_omap4: update twrp.fstab

Change-Id: I01dae9e5a817a32a9f34254f65d0512310d1cca6