message: Add references to the EuroLLVM talks in the README
diff: @@ -109,3 +109,10 @@ building a compiler for a Toy language.
  * Chris Lattner & Jacques Pienaar, Google at
  [Compilers for Machine Learning](https://www.c4ml.org/) workshop at
  [CGO 2019](http://cgo.org/cgo2019/)
  +* "[MLIR: Multi-Level Intermediate Representation for Compiler
  + Infrastructure](https://llvm.org/devmtg/2019-04/talks.html#Keynote_1)"
  + * Tatiana Shpeisman & Chris Lattner, Google at
  + [EuroLLVM 2019](https://llvm.org/devmtg/2019-04)
  +* "[Tutorial: Building a Compiler with MLIR](https://llvm.org/devmtg/2019-04/talks.html#Tutorial_1)"
  + * Mehdi Amini, Jacques Pienaar, Nicolas Vasilache, Google at
  + [EuroLLVM 2019](https://llvm.org/devmtg/2019-04)
  