Update backward-compatibility.md with missing flag docs
Update backward-compatibility.md with missing flag docs

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aehlig/bazel,dslomov/bazel,werkt/bazel,perezd/bazel,dslomov/bazel,perezd/bazel,aehlig/bazel,twitter-forks/bazel,perezd/bazel,twitter-forks/bazel,bazelbuild/bazel,akira-baruah/bazel,dslomov/bazel-windows,twitter-forks/bazel,twitter-forks/bazel,ulfjack/bazel,perezd/bazel,ulfjack/bazel,safarmer/bazel,ButterflyNetwork/bazel,twitter-forks/bazel,aehlig/bazel,perezd/bazel,dslomov/bazel-windows,bazelbuild/bazel,bazelbuild/bazel,dslomov/bazel,ulfjack/bazel,perezd/bazel,katre/bazel,davidzchen/bazel,dropbox/bazel,ButterflyNetwork/bazel,meteorcloudy/bazel,davidzchen/bazel,katre/bazel,cushon/bazel,twitter-forks/bazel,meteorcloudy/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,akira-baruah/bazel,safarmer/bazel,akira-baruah/bazel,ulfjack/bazel,dropbox/bazel,dslomov/bazel,aehlig/bazel,dslomov/bazel,ulfjack/bazel,davidzchen/bazel,katre/bazel,katre/bazel,davidzchen/bazel,akira-baruah/bazel,cushon/bazel,meteorcloudy/bazel,davidzchen/bazel,meteorcloudy/bazel,dropbox/bazel,dslomov/bazel-windows,davidzchen/bazel,aehlig/bazel,ButterflyNetwork/bazel,meteorcloudy/bazel,cushon/bazel,bazelbuild/bazel,katre/bazel,akira-baruah/bazel,cushon/bazel,ulfjack/bazel,dslomov/bazel,safarmer/bazel,dropbox/bazel,bazelbuild/bazel,aehlig/bazel,cushon/bazel,werkt/bazel,meteorcloudy/bazel,safarmer/bazel,akira-baruah/bazel,werkt/bazel,dropbox/bazel,perezd/bazel,dslomov/bazel-windows,dslomov/bazel-windows,twitter-forks/bazel,safarmer/bazel,safarmer/bazel,katre/bazel,davidzchen/bazel,dslomov/bazel-windows,werkt/bazel,werkt/bazel,dropbox/bazel,bazelbuild/bazel,werkt/bazel,aehlig/bazel,ulfjack/bazel,ButterflyNetwork/bazel,cushon/bazel,ButterflyNetwork/bazel,dslomov/bazel