Fixes for compile-fail/ tests in wake of destructor lifetime changes.

Author: pnkfelix

src/test/compile-fail/borrowck-borrowed-uniq-rvalue.rs

@@ -14,10 +14,11 @@ extern crate collections;
 use std::collections::HashMap;
 
 fn main() {
+    let tmp;
     let mut buggy_map: HashMap<uint, &uint> = HashMap::new();
     buggy_map.insert(42, &*box 1); //~ ERROR borrowed value does not live long enough
 
-    // but it is ok if we use a temporary
-    let tmp = box 2;
+    // but it is ok if we use a temporary that outlives `buggy_map`.
+    tmp = box 2;
     buggy_map.insert(43, &*tmp);
 }

src/test/compile-fail/borrowck-let-suggestion.rs

@@ -10,7 +10,7 @@
 
 fn f() {
     let x = [1i].iter(); //~ ERROR borrowed value does not live long enough
-                         //~^^ NOTE reference must be valid for the block
+                         //~^ NOTE reference must be valid for the block
                          //~^^ HELP consider using a `let` binding to increase its lifetime
 }
 

src/test/compile-fail/issue-16465.rs

@@ -27,7 +27,6 @@ struct Bar<'a> {
 }
 
 impl<'a> Drop for Bar<'a> {
-//~^ ERROR E0141
     fn drop(&mut self) {
     }
 }