Alpha-rename label to avoid the shadowing lint (which cannot be silenced).

Author: pnkfelix

src/test/ui/run-pass/for-loop-while/loop-labeled-break-value.rs

@@ -15,7 +15,7 @@ fn main() {
     'outer: loop {
         let _: i32 = loop { break 'outer };
     }
-    'outer: loop {
-        let _: i32 = loop { loop { break 'outer } };
+    'outer2: loop {
+        let _: i32 = loop { loop { break 'outer2 } };
     }
 }

src/test/ui/run-pass/for-loop-while/while-let.rs

@@ -36,9 +36,9 @@ pub fn main() {
 
     pq = make_pq();
     sum = 0;
-    'a: while let Some(x) = pq.pop() {
+    'a2: while let Some(x) = pq.pop() {
         if x == 3 {
-            continue 'a;
+            continue 'a2;
         }
         sum += x;
     }