[GR-5193] Convert python llvm compiler wrappers to bash.

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

...racle.truffle.r.native/fficall/src/truffle_llvm/README.md

...le.truffle.r.native/fficall/src/truffle_llvm/llvm_dummy.c

...le.truffle.r.native/fficall/src/truffle_llvm/llvm_dummy.f

com.oracle.truffle.r.native/gnur/edLLVM

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

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

com.oracle.truffle.r.native/run/edMakeconf.etc.llvm

documentation/dev/truffle_llvm_ffi.md

mx.fastr/compilers/fastr-c++

mx.fastr/compilers/have_sulong

mx.fastr/mx_fastr.py

mx.fastr/mx_fastr_compile.py