The C++ dynamic typing tests are failing on Windows, skip for now. (llvm#171922)

This is a follow-on to: llvm#168611 which added a bunch of tests for detecting dynamic types of C++ result variables. I don't actually know how well dynamic type detection works on Windows if at all. It would require Windows support, since the Linux/Darwin version is specific to the Itanium ABI.

Author: jimingham

lldb/test/API/functionalities/expr-result-var/TestCPPExprResult.py

@@ -95,9 +95,11 @@ def check_dereference(self, result_varname, frame, expr_options):
  )
  self.assertEqual(method_result.signed, 500, "Got the right result value")
 
+ @skipIfWindows # Dynamic type resolution on Windows doesn't work
  def test_virtual_dynamic_results(self):
  self.do_test_dynamic_results(True)
 
+ @skipIfWindows # Dynamic type resolution on Windows doesn't work
  def test_non_virtual_dynamic_results(self):
  self.do_test_dynamic_results(False)