I according "Android_User's_Guide" to build android image. When i lunch the product, the build tools display follow information. And i haven't to patch "android_L5.0.0_1.0.0-ga_omxplayer_source.tar.gz" and "android_L5.0.0_1.0.0-ga_wfdsink_source.tar.gz". I think those is not necessary.
john@ca230:~/myandroid$ lunch sabresd_6dq-user
build/core/product_config.mk:222: *** Can not locate config makefile for product "sabresd_6dq". Stop.
** Don't have a product spec for: 'sabresd_6dq'
** Do you have the right repo manifest?