Adopt REmbedRFFI to new way of native functions invocation

...oracle/truffle/r/engine/shell/EmbeddedConsoleHandler.java

...m/oracle/truffle/r/ffi/impl/llvm/TruffleLLVM_Context.java

...om/oracle/truffle/r/ffi/impl/llvm/TruffleLLVM_REmbed.java

...oracle/truffle/r/ffi/impl/managed/Managed_REmbedRFFI.java

...racle/truffle/r/ffi/impl/managed/Managed_RFFIFactory.java

...rc/com/oracle/truffle/r/ffi/impl/nfi/TruffleNFI_Call.java

...com/oracle/truffle/r/ffi/impl/nfi/TruffleNFI_Context.java

...ruffle/r/ffi/impl/nfi/TruffleNFI_DownCallNodeFactory.java

.../com/oracle/truffle/r/ffi/impl/nfi/TruffleNFI_REmbed.java

...acle.truffle.r.native/fficall/src/truffle_nfi/Rembedded.c

....r.runtime/src/com/oracle/truffle/r/runtime/RCleanUp.java

....r.runtime/src/com/oracle/truffle/r/runtime/RSuicide.java

.../src/com/oracle/truffle/r/runtime/ffi/NativeFunction.java

...time/src/com/oracle/truffle/r/runtime/ffi/REmbedRFFI.java