Bump file-io submodule to 0.1.4

hadrian/src/Settings/Warnings.hs

@@ -47,6 +47,7 @@ ghcWarningsArgs = do
         , package directory    ? pure [ "-Wno-unused-imports"
                                       , "-Wno-deprecations" -- https://gitlab.haskell.org/ghc/ghc/-/issues/24240
                                       ]
+        , package fileio       ? pure [ "-Wno-unused-imports" ] -- https://github.com/haskell/file-io/issues/30
         , package ghc          ? pure [ "-Wcpp-undef"
                                       , "-Wincomplete-uni-patterns"
                                       , "-Wincomplete-record-updates"

file-io @ f0b7bf70

-Subproject commit a4a0464ccd38e8380c202949a90b21d9e592aeef
+Subproject commit f0b7bf70160c447a7960945b5316db9f8f299eb7