Fix the platform string for GNU/Hurd
As commited in Cabal https://github.com/haskell/cabal/pull/9434 there is confusion between "gnu" and "hurd". This got fixed in Cabal, we need the converse in Hadrian.
Fixes #24180 (closed)
As commited in Cabal https://github.com/haskell/cabal/pull/9434 there is confusion between "gnu" and "hurd". This got fixed in Cabal, we need the converse in Hadrian.
Fixes #24180 (closed)