XFAIL tests that try to call a function in the inferior.

llvm.org/pr21765

llvm-svn: 247456
diff --git a/lldb/test/expression_command/timeout/TestCallWithTimeout.py b/lldb/test/expression_command/timeout/TestCallWithTimeout.py
index 1ddb11a..32eba36 100644
--- a/lldb/test/expression_command/timeout/TestCallWithTimeout.py
+++ b/lldb/test/expression_command/timeout/TestCallWithTimeout.py
@@ -29,6 +29,7 @@
 
     @expectedFailureFreeBSD("llvm.org/pr19605") # fails on buildbot
     @expectedFlakeyLinux("llvm.org/pr20275")
+    @expectedFailureWindows("llvm.org/pr21765")
     @dwarf_test
     def test_with_dwarf(self):
         """Test calling std::String member function."""