Add explicit import lists to Data.List imports

Related to a future change in Data.List,
https://downloads.haskell.org/ghc/8.10.3/docs/html/users_guide/using-warnings.html?highlight=wcompat#ghc-flag--Wcompat-unqualified-imports

Companion pull&merge requests:

- https://github.com/judah/haskeline/pull/153
- https://github.com/haskell/containers/pull/762
- https://gitlab.haskell.org/ghc/packages/hpc/-/merge_requests/9

After these the actual change in Data.List should be easy to do.

HpcMarkup.hs

@@ -13,7 +13,7 @@ import HpcFlags
 import HpcUtils
 
 import System.FilePath
-import Data.List
+import Data.List (sortBy, find)
 import Data.Maybe(fromJust)
 import Data.Semigroup as Semi
 import Data.Array