[TEMP] m8: don't build dotcase yet

Change-Id: Icf3c98882ab76e160d262f6c40867c88c1bf18d1
[TEMP] m8: disable overlays that don't exist yet

Change-Id: I604c4b7c39b07acf62d6e44b785c9a65f6cb56b8
m8: set partition sizes from gpe

* GPE partition sizes are considerably smaller than carrier
  versions. Use the smaller ones so block based update zips
  don't fail.

Change-Id: If89739e809c8c37a1d5082d3b4e066ede3b1685c
Trying some shit