Update the tutorial to match changes to examples/Kaleidoscope.

One change I'm not folding in is the removal of two unused variables that
caused warnings, because those were there for expository purposes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81721 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed