added packages

Added instance-control, references and haskell-tools packages

build-constraints.yaml

@@ -2662,6 +2662,19 @@ packages:
 
     "Hans-Peter Deifel <hpd@hpdeifel.de> @hpdeifel":
         - hledger-iadd
+        
+    "Boldizsár Németh <nboldi@elte.hu> @nboldi":
+        - instance-control
+        - references
+        - haskell-tools-ast
+        - haskell-tools-backend-ghc
+        - haskell-tools-rewrite
+        - haskell-tools-prettyprint
+        - haskell-tools-refactor
+        - haskell-tools-demo
+        - haskell-tools-cli
+        - haskell-tools-daemon
+        - haskell-tools-debug
 
     # If you stop maintaining a package you can move it here.
     # It will then be disabled if it starts causing problems.