kili 770fd1c403 Update to ghc-8.6.4. ...

Joint work with Greg Steuck.

Marked as BROKEN until all the following churn on hs-ports is in.

2019-09-30 11:44:18 +00:00

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Update to ghc-8.6.4.

2019-09-30 11:44:18 +00:00