Mark TestExprHelpExamples.py as expected to fail on Linux

- requires memory allocation during expression evaluation
- opened related bugzilla 14805

llvm-svn: 171547

lldb/test/expression_command/radar_9673664/TestExprHelpExamples.py

@@ -20,6 +20,7 @@ class Radar9673644TestCase(TestBase):
         self.line = line_number(self.main_source, '// Set breakpoint here.')
 
     # rdar://problem/9673664
+    @expectedFailureLinux # bugzilla 14805 -- expressions that require memory allocation evaluate incorrectly on Linux
     def test_expr_commands(self):
         """The following expression commands should just work."""
         self.buildDefault()