core: main: remove all the spam about including make files

Change-Id: Ifd2ef0e239d16b169c572472416c2c31df62a367
envsetup: do not print an error if complete fails

complete is a bashism; so it will fail on other shells. Avoid printing
an error if that is the case.

Change-Id: Id6d6311792f409cc3a697c7a2bb003863f1afe60
envsetup: drop unnecesary exports

export -f is a bashism and we don't actually need it, so lets remove it.

Change-Id: I9228cef0c4a9543b3d34fdc39a368ad0238431e2
envsetup: Mark zsh as compatible

Basic functionality has been tested on zsh 5.0.2 and has been found to
work correctly.

Change-Id: I02e5e3bedf56b43104c280d9737ae7b334357643
Support building with GNU make 4.0

* It works just fine, no need for the warning.

Change-Id: Ifa2ab17454edfcd8b7840a7534f70576286f2864
Kernel : Use Linaro 4.8.2 Toolchain

Change-Id: I25f67548af4244c20179437ad4ee0c68aaf8213a

Conflicts:
	envsetup.sh
Rom : Use Linaro 4.8 Toolchain // Use -O3 for Optimization

Change-Id: I2536a57ef644a17a3fb06aeaca420a1fda43f224
Hide more warnings

Change-Id: I6a6b768efa10a1f7419856d98ceefda41c6d4e37