Fix superuser for user builds

Change-Id: Ib2d8d38825a2982d2bc7625eeb1d9c1f9631a400
Signed-off-by: Evan Anderson <evan1124@gmail.com>
Update prebuilt su

now at v1.85
Signed-off-by: Evan <evan1124@gmail.com>

Change-Id: I8042af1d0b3be6db178a0d60a6748bfa3e1ac0d0
Merge branch 'kitkat-legacy' of https://github.com/cj360/android_vendor_pa into kitkat-legacy