cudatoolkit: prune broken symlinks in postFixup

As cudatoolkit is currently written, 11.8 introduces a broken symlink in `include` (also named `include`) and in `lib` (named `lib64`).

This trips up some consumers, like `tensorflow-gpu`.

pkgs/development/compilers/cudatoolkit/common.nix

@@ -229,6 +229,13 @@ stdenv.mkDerivation rec {
     addOpenGLRunpath $out/cuda_sanitizer_api/compute-sanitizer/*
     addOpenGLRunpath $out/cuda_sanitizer_api/compute-sanitizer/x86/*
     addOpenGLRunpath $out/target-linux-x64/*
+  '' +
+  # Prune broken symlinks which can cause problems with consumers of this package.
+  ''
+    while read -r -d "" file; do
+      echo "Found and removing broken symlink $file"
+      rm "$file"
+    done < <(find "$out" "$lib" "$doc" -xtype l -print0)
   '';
 
   # cuda-gdb doesn't run correctly when not using sandboxing, so