Running CHISEL with customized LLVM & Clang locations

[Mohannadcse]

I'm trying to build CHISEL from source, but I don't want to install LLVM on my machine, instead, I downloaded the binary and source of Clang and LLVM (I didn't build LLVM from source). I exported the paths to LLVM and Clang into the .bashrc file. As shown below.

However, I'm still I can't build CHISEL and cmake keeps complaining about not finding the path to LLVM_CONFIG_EXECUTABLE