Make bundlerepo use proper index format for revlogng
bundlerepo just appends index entries from the bundle onto the index for the
current repo. This patch makes sure it appends the correct format.
port:4:export
port:4:vaportight
port:4:import/export
FIXME: history is wrong here
port:1:1:-:eggs:import
port:1:2:+:eggs:vaportight
port:1:3:+:eggs:import/export
port:0:2:+:spam:export
port:0:1:+:spam:import
port:4:import/export