build: no longer build emulator by default

This is just increasing build times when most people are not using it.
Let's speed up builds a bit.

Building emulator should still be possible by appending BUILD_EMULATOR=true
to the build command

PS2: Let's keep the darwin warning.

Change-Id: Ibd8e2b90455bd603a691c7b95466068b6fae212a
Signed-off-by: Andrew Warfield <hiasant@gmail.com>

...
Include privileged apps with app zip file.

Include apps that appear under /system/priv-app
to also be included with the zip of all the apps.

Change-Id: If4687cf4c471877f11d78b68bad96f1842e49d87
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>
Merge remote-tracking branch 'purity/kitkat' into kk44p