Create Archive directory before using it.
Create Archive directory before using it.

This is just a quick fix to open the tree. Plan is to add os.makedirs up above
so that these steps can run in parallel. But for now we can depend on
ArchiveBuild creating the directory as we did in the past.

BUG=none
TBR=broken archive_build on internal bots
TEST=Verify archive_build stage runs first.

Change-Id: I55caf5f9f81a4c8705d4b312a706153a39bc7eed
Reviewed-on: http://gerrit.chromium.org/gerrit/5267
Reviewed-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>
Tested-by: David James <f231dc574bbeb62604660cbc162d1b8642a0a3af@chromium.org>

zhang0137/chromite,coreos/chromite,zhang0137/chromite,coreos/chromite,coreos/chromite,chadversary/chromiumos.chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,zhang0137/chromite,chadversary/chromiumos.chromite