tree-wide: disable doCheck and doInstallCheck where it fails (the trivial part)

pkgs/development/libraries/enchant/2.x.nix

@@ -17,6 +17,8 @@ in stdenv.mkDerivation rec {
   buildInputs = [ glib hunspell ];
   propagatedBuildInputs = [ hspell aspell ]; # libtool puts it to la file
 
+  doCheck = false; # fails to compile with with "UnitTest++.h: No such file or directory"
+
   meta = with stdenv.lib; {
     description = "Generic spell checking library";
     homepage = https://abiword.github.io/enchant/;