message: Accept that i686-pc-windows-gnu is broken for now on appveyor.
diff: @@ -15,7 +15,7 @@ environment:
  channel: 1.6.0
  matrix:
  allow_failures:
  - - target: aarch64-pc-windows-msvc
  + - host: i686-pc-windows-gnu
  install:
  - ps: if (ls -r . -fi "*.rs" | sls "`t") { throw "Found tab character" }
  