vendor: clean up versioning

there is no need to define these variables twice.

if the build type must be something other than "HOMEMADE",
include "export ROM_BUILDTYPE=build_type" with the make command

and fix the predexopt derp

Change-Id: If698faa90be5a3367183919412c3fa0745e99f63
2 files changed
tree: a126504cdfd5d04050dde9c3e36cbde0118a2bcf
  1. config/
  2. overlay/
  3. prebuilt/
  4. sepolicy/
  5. utils/
  6. Android.mk