Regenerate wrappers #131
Description
The current libllvm wrappers aren't autogenerated, but are a clean-up and hacked-up version of older wrappers I managed to generate with Clang.jl back in the days. Now that Clang.jl has been revamped and looks capable of wrapping libclang (JuliaInterop/Clang.jl#210), we should try to generate proper libllvm headers once again.