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

Change-Id: Ibd8e2b90455bd603a691c7b95466068b6fae212a
MAKE NOVO & MAGICBROWNIES!

PS2: It's impossible to make Lokesh happy :P
PS3: ERRRR
PS4:Fix everything

This commit is for Lokesh, I really want him to get his builds down to 18 mins. Here's rooting for ya lokesh!

To use: Run "make magicbrownies" and it will clear only the out/target/product folder, for hopefully, faster builds.

Change-Id: I6ff6ffcf7c351cf18d90ab3970b13b806bffed54

Conflicts:
	core/main.mk
Moar clean options!

appclean: clears out all apks
imgclean: clears out all img files
kernelclean: clears out all kernel stuff
systemclean: clears out all system stuff
recoveryclean: clears out all recovery stuff
rootclean: clears out all root stuff

Change-Id: I3b6d9ca53e083385cca3ae66084c5a39901b3d1b
Make it dirty

Change-Id: Iaf28934f4d3c90b681289696cfa9fadb1ae102ec
Mka lego!

Signed-off-by: anerik <anerikgames@gmail.com>
Use linaro 4.9 for rom, sm 4.8.3 for kernel

Signed-off-by: anerik <anerikgames@gmail.com>
Show what we're building with

Signed-off-by: anerik <anerikgames@gmail.com>