Squashed 'hack/libbuild/' changes from 7b02998..f1e269a
Squashed 'hack/libbuild/' changes from 7b02998..f1e269a

f1e269a Update alpine image to 1.9.1

git-subtree-dir: hack/libbuild
git-subtree-split: f1e269abcaadb464d4e205ff44669209b023a669

appscode/voyager,appscode/voyager,appscode/voyager