Skip failing test on older versions of clang.

llvm-svn: 363202

lldb/packages/Python/lldbsuite/test/functionalities/return-value/TestReturnValue.py

@@ -221,6 +221,7 @@ class ReturnValueTestCase(TestBase):
         self.return_and_test_struct_value("return_base_class")
         self.return_and_test_struct_value("return_derived_class")
 
+    @skipIf(compiler="clang", compiler_version=['<', '7.0'])
     def return_and_test_struct_value(self, func_name):
         """Pass in the name of the function to return from - takes in value, returns value."""