ignore 2 tests in polonius compare-mode

These 2 tests are ignored in the NLL compare-mode, and are ignored in
the polonius compare-mode for the same reasons.

Author: lqd

src/test/ui/lub-glb/old-lub-glb-hr-noteq2.rs

@@ -10,6 +10,7 @@
 // relationship, and that holds.
 //
 // ignore-compare-mode-nll
+// ignore-compare-mode-polonius
 
 fn foo(x: for<'a, 'b> fn(&'a u8, &'b u8) -> &'a u8, y: for<'a> fn(&'a u8, &'a u8) -> &'a u8) {
     // The two types above are not equivalent. With the older LUB/GLB

src/test/ui/lub-glb/old-lub-glb-hr-noteq2.stderr

@@ -1,5 +1,5 @@
 error[E0308]: `match` arms have incompatible types
-  --> $DIR/old-lub-glb-hr-noteq2.rs:20:14
+  --> $DIR/old-lub-glb-hr-noteq2.rs:21:14
    |
 LL |       let z = match 22 {
    |  _____________-

src/test/ui/meta/meta-expected-error-wrong-rev.a.stderr

@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/meta-expected-error-wrong-rev.rs:13:18
+  --> $DIR/meta-expected-error-wrong-rev.rs:14:18
    |
 LL |     let x: u32 = 22_usize;
    |            ---   ^^^^^^^^ expected `u32`, found `usize`

src/test/ui/meta/meta-expected-error-wrong-rev.rs

@@ -1,4 +1,5 @@
 // ignore-compare-mode-nll
+// ignore-compare-mode-polonius
 
 // revisions: a
 // should-fail