Add regression test for rust-lang#42114

Signed-off-by: Yuki Okushi <[email protected]>

tests/ui/higher-rank-trait-bounds/issue-42114.rs

@@ -0,0 +1,20 @@
+// check-pass
+
+fn lifetime<'a>()
+where
+    &'a (): 'a,
+{
+    /* do nothing */
+}
+
+fn doesnt_work()
+where
+    for<'a> &'a (): 'a,
+{
+    /* do nothing */
+}
+
+fn main() {
+    lifetime();
+    doesnt_work();
+}