sdk:enable emulator to launch in build environment

Recent changes in emulator requires advancedFeatures.ini,
encryptionkey.img and new kernels (such as 3.18) at OUT directory
so emulator can find them.

This CL set those up as part of the build process.

Change-Id: Ib3b7c4c48a22cecb44255e643402fd1c37797522