* LLVM 3.4 does not allow bitcasting pointer between two address
spaces, it just crashes when it is done. Generate the new pointercast
instruction instead in such cases.

* Synchronize the pass list of pocl-workgroup to the pocl-standalone.

* LLVM 3.4 has dropped DisableSimplifyLibcalls. Do not add it in the
  LLVMAPI mode.