[GR-9247] FastR twin-build.

...c/com/oracle/truffle/r/ffi/impl/llvm/TruffleLLVM_DLL.java

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

com.oracle.truffle.r.native/fficall/Makefile

com.oracle.truffle.r.native/fficall/src/common/Makefile

...oracle.truffle.r.native/fficall/src/truffle_llvm/Makefile

com.oracle.truffle.r.native/fficall/src/truffle_nfi/Makefile

com.oracle.truffle.r.native/gnur/patch/src/library/lib.mk

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

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-fc

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

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

...ime/src/com/oracle/truffle/r/runtime/ffi/RFFIContext.java

mx.fastr/mx_copylib.py