Let FE use derived types for DW_TAG_friend.
Patch by Alexander Herz!

llvm-svn: 111861
diff --git a/llvm/lib/Analysis/DebugInfo.cpp b/llvm/lib/Analysis/DebugInfo.cpp
index c380028..5ca89c6 100644
--- a/llvm/lib/Analysis/DebugInfo.cpp
+++ b/llvm/lib/Analysis/DebugInfo.cpp
@@ -135,6 +135,7 @@
   case dwarf::DW_TAG_restrict_type:
   case dwarf::DW_TAG_member:
   case dwarf::DW_TAG_inheritance:
+  case dwarf::DW_TAG_friend:
     return true;
   default:
     // CompositeTypes are currently modelled as DerivedTypes.