Compiling version that runs on modern version of LLVM [Passes 23/33 Tests]

[LouisJenkinsCS]

After spending the better part of 2 days trying to get this code to compile on modern systems without resorting to modifying it, discovering that modern versions of GCC cannot build LLVM-3.6.2, dealing with problems that arose while attempting to build LLVM-3.6.2 through Spack, I decided to just modify the LLVM plugin myself to get it work on modern versions of LLVM. I can confirm that this can now build quite easily on both LLVM-11 and LLVM-8, and likely even sooner. For those interested, it is available here.

[LouisJenkinsCS]

Docker image available on DockerHub and GitHub.