test/bench/shootout: fix gccgo binary-list-freelist test
test/bench/shootout: fix gccgo binary-list-freelist test

R=r
CC=golang-dev
http://codereview.appspot.com/6202046
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go