Fix test cases to reflect that #32014...went away

Not sure what was the bug. Fixes #32014.

Author: nikomatsakis

src/test/incremental/dirty_clean.rs

@@ -48,7 +48,6 @@ mod z {
     #[rustc_dirty(label="TransCrateItem", cfg="cfail2")]
     pub fn z() {
         //[cfail2]~^ ERROR `TypeckItemBody("z::z")` found in dep graph, but should be dirty
-        // FIXME(#32014) -- TransCrateItem ought to be clean, but it is in fact
-        // dirty, hence we don't see an error here.
+        //[cfail2]~| ERROR `TransCrateItem("z::z")` found in dep graph, but should be dirty
     }
 }

src/test/incremental/string_constant.rs

@@ -41,7 +41,7 @@ mod y {
     use x;
 
     #[rustc_clean(label="TypeckItemBody", cfg="rpass2")]
-    #[rustc_dirty(label="TransCrateItem", cfg="rpass2")]
+    #[rustc_clean(label="TransCrateItem", cfg="rpass2")]
     pub fn y() {
         x::x();
     }
@@ -51,7 +51,7 @@ mod z {
     use y;
 
     #[rustc_clean(label="TypeckItemBody", cfg="rpass2")]
-    #[rustc_dirty(label="TransCrateItem", cfg="rpass2")]
+    #[rustc_clean(label="TransCrateItem", cfg="rpass2")]
     pub fn z() {
         y::y();
     }