haskell-yaml: build with bundled libyaml rather than our system version

It looks like the yaml package bundles an unreleased version of libyaml and
relies on particulars of that versions behavior. Therefore, the package no
longer works with the official libyaml 0.1.7 release, which is what we have.

https://github.com/snoyberg/yaml/issues/106

pkgs/development/haskell-modules/configuration-common.nix

@@ -880,4 +880,8 @@ self: super: {
   rank1dynamic = doJailbreak super.rank1dynamic;
 
   cabal-lenses = doJailbreak super.cabal-lenses;
+
+  # https://github.com/snoyberg/yaml/issues/106
+  yaml = disableCabalFlag super.yaml "system-libyaml";
+
 }