message: Fixed typo in llvm version in appveyor
diff: @@ -47,7 +47,7 @@ environment:
  - DESC: "Build ispc with LLVM 7.0 VS2017"
  LLVM_VERSION: 7.0
  DOCKER_NAME: "ispc/test_repo:win_llvm70"
  - - DESC: "Build ispc with LLVM 7.0 VS2017"
  + - DESC: "Build ispc with LLVM 8.0 VS2017"
  LLVM_VERSION: 8.0
  DOCKER_NAME: "ispc/test_repo:win_llvm80"
  