Unroll fn calls to local bindings and keywords

[borkdude]

This should give a speedup for the following case:

$ tmp/master "(time (loop [val 0 cnt 1000000] (let [f (fn [_])] (f 1)) (if (pos? cnt) (recur (inc val) (dec cnt)) val)))"
"Elapsed time: 1352.282812 msecs"
1000000

$ tmp/unroll-local-sym-call "(time (loop [val 0 cnt 1000000] (let [f (fn [_])] (f 1)) (if (pos? cnt) (recur (inc val) (dec cnt)) val)))"
"Elapsed time: 1253.399457 msecs"
1000000