haskell: disable library profiling for static executables

Haskell packages overridden with justStaticExecutables
(like cabal-install, stack, pandoc, darcs, etc.) don't provide
libraries in the end result so it's futile to build them with library
profiling enabled because it will just take extra time.

pkgs/development/haskell-modules/lib.nix

@@ -234,6 +234,7 @@ rec {
    */
   justStaticExecutables = drv: overrideCabal drv (drv: {
     enableSharedExecutables = false;
+    enableLibraryProfiling = false;
     isLibrary = false;
     doHaddock = false;
     postFixup = "rm -rf $out/lib $out/nix-support $out/share/doc";