Use legacy cabal commands, despite warnings

"cabal update" and "cabal install" will generate warnings on newer
cabal-install versions, but still work. The "cabal v1-update" and
"cabal v1-install" commands are not supported by older cabal-install.

So, until we have the next gen cabal-helper, we will have to put up
with some warnings when installing with the newer cabal-install.

Author: alanz

Makefile

@@ -99,8 +99,8 @@ submodules:
 ## NOTE 3: This is needed for stack only projects too
 cabal:
 	stack install cabal-install
-	cabal v1-update
-	cabal v1-install Cabal-2.4.1.0 --with-compiler=$(GHC)
+	cabal update
+	cabal install Cabal-2.4.1.0 --with-compiler=$(GHC)
 .PHONY: cabal
 
 # ------------------------------------------------------