One needs to call setJITMemoryManager for LLVM 3.3, instead of
setMCJITMemoryManager.
This regressed in commits 065256df/75ad4fe7 when trying to make the
code to build with LLVM 3.6.
Tested MCJIT with LLVM 3.3 to 3.6.
Reviewed-by: Roland Scheidegger <sroland@vmware.com>