add aetherar vendor product on top of cm product

Change-Id: Iae864822a959aff6b41a2736b01d11fde994c556
inherit vendor aetherar if it exists

Change-Id: I573435ecff412391c509e00fcdbf3b6af4ad94d4
add CM_VERSION to indicate the rom being built

Change-Id: I2de765e382240b563664f15bf26e44ca6c0832b9
fix typos which prevent overlay from working

Change-Id: I052b219782c94b119ce0f044e47988dffa9956ad