added i9082 vendor,kernel,device tree.

Init core trees without any device/kernel/vendor :

repo init -u https://github.com/AOGP/android.git -b kitkat

Init repo only for a i9082 device :

repo init -u https://github.com/AOGP/android.git -b kitkat -g all,-notdefault,i9082,samsung

This will help users not to download unneccessary repos of unused devices and kernels and vendors.

Adopted from AOKP manifest.