Fix the test I broke, and also fix a crash when declaring a virtual destructor. Add debug info support for pure virtual member functions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94519 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenCXX/debug-info.cpp b/test/CodeGenCXX/debug-info.cpp
index cb6e830..f18e9b0 100644
--- a/test/CodeGenCXX/debug-info.cpp
+++ b/test/CodeGenCXX/debug-info.cpp
@@ -24,3 +24,20 @@
   typedef struct { A x; } B;
   B x;
 }
+
+// PR4890
+namespace PR4890 {
+  struct X {
+    ~X();
+  };
+
+  X::~X() { }
+}
+
+namespace VirtualDtor {
+  struct Y {
+    virtual ~Y();
+  };
+  
+  Y::~Y() { }
+}