setup_board: add portage-utils wrappers too
setup_board: add portage-utils wrappers too

I use these wrappers all the time on my own system.

BUG=None
TEST=`./setup_board --board=x86-mario && qlist-x86-mario -Iv` works

Change-Id: I609ea07337b2fd14257fae9a0c89b544a40beab9
Reviewed-on: https://gerrit.chromium.org/gerrit/16071
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Commit-Ready: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Tested-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

coreos/scripts,nicescale/scripts,sigma/coreos-scripts,glevand/coreos--scripts,gtank/scripts,smilart/scripts,zhang0137/scripts,fivethreeo/scripts,marineam/coreos-scripts,marineam/coreos-scripts,mjg59/scripts,crawford/scripts,andrejro/coreos--scripts,bcwaldon/coreos-scripts,nicescale/scripts,nicescale/scripts,endocode/scripts,marineam/coreos-scripts,glevand/coreos--scripts,endocode/scripts,mischief/scripts,trnubo/scripts,smilart/scripts,smilart/scripts,fivethreeo/scripts,mischief/scripts,andrejro/coreos--scripts,vmware/coreos-scripts,endocode/scripts,zhang0137/scripts,sigma/coreos-scripts,mjg59/scripts,sigma/coreos-scripts,trnubo/scripts,mjg59/scripts,BugRoger/scripts,bcwaldon/coreos-scripts,zhang0137/scripts,andrejro/coreos--scripts,mischief/scripts,coreos/scripts,BugRoger/scripts,BugRoger/scripts,fivethreeo/scripts,gtank/scripts,vmware/coreos-scripts,bcwaldon/coreos-scripts,crawford/scripts,vmware/coreos-scripts,trnubo/scripts,gtank/scripts,crawford/scripts