build_image: use pbzip2 when decompressing glibc
build_image: use pbzip2 when decompressing glibc

BUG=None
TEST=build_image for daisy worked

Change-Id: If2343bc1f13a23bc1b6bc0eae9a4ed8938b53eb4
Reviewed-on: https://gerrit.chromium.org/gerrit/37361
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Commit-Ready: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>
Tested-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

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