Merge pull request #2953 from wilx/master

Add hs-bibutils.

build-constraints.yaml

@@ -3372,6 +3372,9 @@ packages:
     "Hexirp <hexirp@gmail.com> @Hexirp":
         - doctest-driver-gen
 
+    "Václav Haisman <vhaisman@gmail.com> @wilx":
+        - hs-bibutils
+
     # If you stop maintaining a package you can move it here.
     # It will then be disabled if it starts causing problems.
     # See https://github.com/fpco/stackage/issues/1056