configure: Fix idl indentation
configure: Fix idl indentation

scylladb/scylla,kjniemi/scylla,scylladb/scylla,duarten/scylla,raphaelsc/scylla,raphaelsc/scylla,avikivity/scylla,scylladb/scylla,kjniemi/scylla,scylladb/scylla,duarten/scylla,avikivity/scylla,kjniemi/scylla,duarten/scylla,raphaelsc/scylla,avikivity/scylla