Check in testcases that were just in my tree

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3023 91177308-0d34-0410-b5e6-96231b3b80d8

test/CFrontend/2002-04-09-StructRetVal.c

@@ -0,0 +1,10 @@
+struct S {
+  int i;
+  short s1, s2;
+};
+
+struct S func_returning_struct(void);
+
+void loop(void) {
+  func_returning_struct();
+}