Enabling package stringi

...gine/src/com/oracle/truffle/r/engine/shell/REmbedded.java

...oracle/truffle/r/ffi/impl/common/JavaUpCallsRFFIImpl.java

.../src/com/oracle/truffle/r/ffi/impl/interop/DLLInfoMR.java

.../com/oracle/truffle/r/ffi/impl/llvm/TruffleLLVM_Call.java

...src/com/oracle/truffle/r/library/stats/RMultinomNode.java

...oracle.truffle.r.native/fficall/src/truffle_llvm/Memory.c

com.oracle.truffle.r.native/llvm_tools/llvm-c++

com.oracle.truffle.r.native/llvm_tools/llvm-cc

com.oracle.truffle.r.native/llvm_tools/llvm-helper

...e.r.runtime/src/com/oracle/truffle/r/runtime/ffi/DLL.java

...e/src/com/oracle/truffle/r/runtime/ffi/RFFIVariables.java