ghc8107-ghc923: patch haddock to generate correct source links

Previously links to external modules were jacked because haddock was
doing them wrong. I fixed this upstream in early May 2022 but it's not
out yet.

pkgs/development/compilers/ghc/8.10.7.nix

···
     # when adding new GHC releases in nixpkgs.
     ./respect-ar-path.patch
 
+    # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
+    (fetchpatch {
+      url = "https://patch-diff.githubusercontent.com/raw/haskell/haddock/pull/1482.patch";
+      sha256 = "sha256-8w8QUCsODaTvknCDGgTfFNZa8ZmvIKaKS+2ZJZ9foYk=";
+      extraPrefix = "utils/haddock/";
+      stripLen = 1;
+    })
+
     # cabal passes incorrect --host= when cross-compiling
     # https://github.com/haskell/cabal/issues/5887
     (fetchpatch {

pkgs/development/compilers/ghc/9.0.2.nix

···
   outputs = [ "out" "doc" ];
 
   patches = [
+    # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
+    (fetchpatch {
+      url = "https://patch-diff.githubusercontent.com/raw/haskell/haddock/pull/1482.patch";
+      sha256 = "sha256-8w8QUCsODaTvknCDGgTfFNZa8ZmvIKaKS+2ZJZ9foYk=";
+      extraPrefix = "utils/haddock/";
+      stripLen = 1;
+    })
+
     # Add flag that fixes C++ exception handling; opt-in. Merged in 9.4 and 9.2.2.
     # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/7423
     (fetchpatch {

pkgs/development/compilers/ghc/9.2.3.nix

···
 
   outputs = [ "out" "doc" ];
 
+  patches = [
+    # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
+    (fetchpatch {
+      url = "https://patch-diff.githubusercontent.com/raw/haskell/haddock/pull/1482.patch";
+      sha256 = "sha256-8w8QUCsODaTvknCDGgTfFNZa8ZmvIKaKS+2ZJZ9foYk=";
+      extraPrefix = "utils/haddock/";
+      stripLen = 1;
+    })
+  ];
+
   postPatch = "patchShebangs .";
 
   # GHC needs the locale configured during the Haddock phase.