Haskell: cap cabal-install make jobs at 64
Haskell: cap cabal-install make jobs at 64

Fixes #49509.

Closes #49511.

Signed-off-by: Mike McQuaid <a17fed27eaa842282862ff7c1b9c8395a26ac320@mikemcquaid.com>

filcab/homebrew,filcab/homebrew,filcab/homebrew,filcab/homebrew