Fix assertion failure when parsing linkage specifications (PR5921),
from Keir Mierle!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95516 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenCXX/extern-c.cpp b/test/CodeGenCXX/extern-c.cpp
index 427a45a..ca5cd73 100644
--- a/test/CodeGenCXX/extern-c.cpp
+++ b/test/CodeGenCXX/extern-c.cpp
@@ -10,4 +10,7 @@
 // RUN: grep "@_ZN3foo1cE = global i32" %t | count 1
 int c = 5;
 
+// RUN: not grep "@_ZN3foo1dE" %t
+extern "C" struct d;
+
 }