added distinct installation of gcc 4.4 4.6 and 4.7 :
Contarty to what seems popular believe you don't need
install a different fucking operating system just because you
want to build older versions of android, you don't even need
to chroot FFS : update-alternatives takes care of all that shit
and has been doing so since 1995 - it's the future

switch gcc versions after installation using

update-alternatives --config gcc

Add missing auto yes to archivers and linaro-tools installations

TESTED ON the commit date using lubuntu 13.04 64bit