build: Build with colors

Based on tpruvot/chirayudesai's commits, add some color to stdout
and but make it a little easier to customize. Colors are now mapped to
categories and can be edited in Makefile if you or your terminal's
background color do not like them. Defaults:

host stuff: yellow
target stuff: cyan
install/copy: green
filesystem/images: green
imports/exports/includes/notices: green
deletes: red
complete msg: bold green

Coloring can be disabled with "export BUILD_WITH_COLORS=0"

Change-Id: Idcfe9bbf925759f88425f914269855da05c5eef0

Conflicts:
	core/Makefile
	core/base_rules.mk
	core/definitions.mk
	core/host_java_library.mk
	core/java.mk
	core/tasks/product-graph.mk

Conflicts:

	core/Makefile
Remove optional "Home Sample" Launcher

Built for Grouper last night and on first boot to home screen there were two launcher options ("Home Sample" and "Launcher").
This commit removes "Home Sample"
support gcc 4.8; more Os