fix: add .hash files to the cache (#7291)

These files are new in v4.1.0. If we don't cache them (or regenerate them, but they are tiny files so there is no reason not to cache them) then lake gets messed up unless you use the `-R` option in the next `lake build`.



Co-authored-by: Mario Carneiro <di.gama@gmail.com>

Cache/IO.lean

@@ -245,10 +245,13 @@ Each build file also has a `Bool` indicating whether that file is required for c
 def mkBuildPaths (path : FilePath) : IO $ List (FilePath × Bool) := do
   let packageDir ← getPackageDir path
   return [
-    (packageDir / LIBDIR / path.withExtension "trace", true),
+    (packageDir / LIBDIR / path.withExtension "trace", true), -- this one has to be first
     (packageDir / LIBDIR / path.withExtension "olean", true),
+    (packageDir / LIBDIR / path.withExtension "olean.hash", true),
     (packageDir / LIBDIR / path.withExtension "ilean", true),
+    (packageDir / LIBDIR / path.withExtension "ilean.hash", true),
     (packageDir / IRDIR  / path.withExtension "c", true),
+    (packageDir / IRDIR  / path.withExtension "c.hash", true),
     (packageDir / LIBDIR / path.withExtension "extra", false)]
 
 /-- Check that all required build files exist. -/

lake-manifest.json

@@ -28,7 +28,7 @@
   {"git":
    {"url": "https://github.com/leanprover/std4",
     "subDir?": null,
-    "rev": "67855403d60daf181775fa1ec63b04e70bcc3921",
+    "rev":  "67855403d60daf181775fa1ec63b04e70bcc3921",
     "opts": {},
     "name": "std",
     "inputRev?": "main",