Update llvm to the latest version

[r-marques]

resolves #6

• Updated patches to work with the latest version of llvm
• Created a tar with the latest version of llvm patched

llvm now uses cmake instead of configure. I think I got all the options right.

[maxhowald]

Wow, thanks a lot! Will review this and merge it shortly.

[r-marques]

While creating the tar with the new patched llvm I omitted this step svn co -r 209914 http://llvm.org/svn/llvm-project/test-suite/trunk test-suite in https://github.com/pepper-project/pequin/blob/master/compiler/buffetfsm/README.md. With this it generated a 400 MB tar.

The documentation in https://github.com/pepper-project/pequin/blob/master/compiler/buffetfsm/README.md also needs to be updated to reflect the latest revision number of llvm.

And maybe we need to add cmake to the dependency list of the distros.