JIT tweak/note for changed LLVM 3.4 API.
JIT tweak/note for changed LLVM 3.4 API.

rsmmr/hilti,FrozenCaribou/hilti,FrozenCaribou/hilti,rsmmr/hilti,rsmmr/hilti,FrozenCaribou/hilti,rsmmr/hilti,FrozenCaribou/hilti,rsmmr/hilti,FrozenCaribou/hilti