[haskell-llvm] llvm-patch: Generalise the CallArgs type class so you can use call with two return types within one module

[Henning Thielemann]

Hi Max,

you removed the 'r' parameter from the CallArgs class. I depend on the 
CallArgs class in llvm-extra. Can you please increase the version number 
of llvm to 0.9.2? Although I do not know whether 'llvm' wants to comply to 
the package versioning policy, for me it would be good, to try it loosely 
at least.