[CIR] Introduce a new dir in tests for known crashes to fix

We figure it would be nice to have a common place with all our known
crashes that is tracked by git and is actively verified whether or not
we can now support the crashes by lit. It can act as our source of truth
for known failures and also being potential good first tasks for new
developers.

Add a simple test case of a known crash that involves copying a struct
in a catch.

Reviewers: smeenai, bcardosolopes

Reviewed By: bcardosolopes

Pull Request: #1243

Author: lanza

clang/test/CIR/crashes/copy-on-catch.cpp

@@ -0,0 +1,16 @@
+// RUN: %clang_cc1 -triple aarch64-none-linux-android21 -fclangir -emit-cir %s -o %t.cir -fcxx-exceptions -fexceptions | FileCheck %s
+// XFAIL: *
+
+// CHECK: cir.func
+
+struct E {};
+E e;
+
+void throws() { throw e; }
+
+void bar() {
+  try {
+    throws();
+  } catch (E e) {
+  }
+}