add two old crash tests

tests/crashes/108428.rs

@@ -0,0 +1,6 @@
+//@ known-bug: #108428
+//@ needs-rustc-debug-assertions
+//@ compile-flags: -Wunused-lifetimes
+fn main() {
+    let _: extern fn<'a: 'static>();
+}

tests/crashes/132826.rs

@@ -0,0 +1,10 @@
+//@ known-bug: #132826
+pub trait MyTrait {
+    type Item;
+}
+
+impl<K> MyTrait for Vec<K> {
+    type Item = Vec<K>;
+}
+
+impl<K> From<Vec<K>> for <Vec<K> as MyTrait>::Item {}