This commit adds the ability to archive tars on windows builds.
As windows filepaths have colons in them (i.e. c:/kibana)
tar thinks it is accessing a remote datasource.
Adding the --force-local flag tells tar to archive a local file.
We do not release zip archives for any operating system except windows,
and we do not release tar.gz archives for windows. For consistency and
clarity sake, we'll explicitly list the architecture (x86) of the
windows build as well.
