Add Custom Kernel for Xperia Z (Yuga)

As the device maintainer, I propose to add this to the repo as a special case.
There are no existing repo's in the manifest that sync for yuga except for the
generic bottle service

Change-Id: Ib506201ffd63819daa777dfe412f9ff8962c6fc7
Merge "Add Custom Kernel for Xperia Z (Yuga)" into kk44