message: Update changelog for LLVM cleanup.
diff: @@ -5,6 +5,7 @@ All PRs to the Wasmer repository must add to this file.
  Blocks of changes will separated by version increments.
  ## **[Unreleased]**
  +- [#510](https://github.com/wasmerio/wasmer/pull/510) Simplify construction of floating point constants in LLVM backend. Fix LLVM assertion failure due to definition of %ctx.
  ## 0.5.1 - 2019-06-24
  - [#508](https://github.com/wasmerio/wasmer/pull/508) Update wapm version, includes bug fixes
  