update inherent_impls tests

Now that we are visiting things in a different order during lowering,
adding parameters winds up affecting the HirIds assigned to thinks in
the method body, whereas it didn't before. We could fix this by
reordering the order in which we visit `generics` during lowering, but
this feels very fragile. Seems better to just let typeck tables be
dirty here.

Author: nikomatsakis

src/test/incremental/hashes/inherent_impls.rs

@@ -370,9 +370,7 @@ impl Foo {
 #[rustc_metadata_clean(cfg="cfail2")]
 #[rustc_metadata_clean(cfg="cfail3")]
 impl Foo {
-    // FIXME(michaelwoerister): This is curious but an unused lifetime parameter doesn't seem to
-    // show up in any of the derived data structures.
-    #[rustc_clean(cfg="cfail2", except="Hir,HirBody")]
+    #[rustc_clean(cfg="cfail2", except="Hir,HirBody,TypeckTables")]
     #[rustc_clean(cfg="cfail3")]
     #[rustc_metadata_clean(cfg="cfail2")]
     #[rustc_metadata_clean(cfg="cfail3")]
@@ -395,7 +393,7 @@ impl Foo {
 impl Foo {
     #[rustc_clean(
         cfg="cfail2",
-        except="Hir,HirBody,GenericsOfItem,PredicatesOfItem,TypeOfItem",
+        except="Hir,HirBody,GenericsOfItem,PredicatesOfItem,TypeOfItem,TypeckTables",
     )]
     #[rustc_clean(cfg="cfail3")]
     #[rustc_metadata_dirty(cfg="cfail2")]
@@ -441,7 +439,8 @@ impl Foo {
 #[rustc_metadata_clean(cfg="cfail2")]
 #[rustc_metadata_clean(cfg="cfail3")]
 impl Foo {
-    #[rustc_clean(cfg="cfail2", except="Hir,HirBody,GenericsOfItem,PredicatesOfItem,TypeOfItem")]
+    #[rustc_clean(cfg="cfail2", except="Hir,HirBody,GenericsOfItem,PredicatesOfItem,\
+                                        TypeOfItem,TypeckTables")]
     #[rustc_clean(cfg="cfail3")]
     #[rustc_metadata_dirty(cfg="cfail2")]
     #[rustc_metadata_clean(cfg="cfail3")]
@@ -462,7 +461,7 @@ impl Foo {
 #[rustc_metadata_clean(cfg="cfail2")]
 #[rustc_metadata_clean(cfg="cfail3")]
 impl Foo {
-    #[rustc_clean(cfg="cfail2", except="Hir,HirBody,PredicatesOfItem")]
+    #[rustc_clean(cfg="cfail2", except="Hir,HirBody,PredicatesOfItem,TypeckTables")]
     #[rustc_clean(cfg="cfail3")]
     #[rustc_metadata_dirty(cfg="cfail2")]
     #[rustc_metadata_clean(cfg="cfail3")]