Adapt tilapia to new vendor.

- Fix common mk index.
- Remove useless pa_addons.mk.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Change-Id: I0dec1724bf2dd5715b3c74e5cbc62303f2223122
Get ROM_VERSION_TAG correctly

Change-Id: I9239ca0db1e157cad666a426773ee3941a7232e4
Merge remote-tracking branch 'PA-vendor/kitkat' into kitkat