Added variables to support seperate vendor patition.
Added variables to support seperate vendor patition.

Change-Id: I73cc76697e138aa8ce1273d410391d55c8d7f34f
Signed-off-by: Daniel Rosenberg <b28fe47f344ea47a742972f6caa7ef1537d21708@google.com>

xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build,xorware/android_build