[lldb] Disable TestNamespaceLookup in DWARF 5 + dSYM setting

[fdeazeve]

Summary

The ordering in which functions are presented to the expression evaluator in
this test setting triggers a known bug in LLDB.

lldb/test/API/lang/cpp/namespace/TestNamespaceLookup.py

def test_scope_lookup_with_run_command(self):
         self.expect_expr("A::B::func()", result_type="int", result_value="4")
         # Evaluate func(10) - should call ::func(int)
         self.expect_expr("func(10)", result_type="int", result_value="11")
         # Evaluate A::foo() - should call A::foo()
         self.expect_expr("A::foo()", result_type="int", result_value="42")
 
         # Continue to BP_file_scope at file scope
         self.runToBkpt("continue")
+        # FIXME: In DWARF 5 with dsyms, the ordering of functions is slightly
+        # different, which also hits the same issues mentioned previously.
+        if (configuration.dwarf_version <= 4 or
+            self.getDebugInfo() == 'dwarf'):
             self.expect_expr("func()", result_type="int", result_value="2")
 
         # Continue to BP_ns_scope at ns scope
         self.runToBkpt("continue")
         # Evaluate func(10) - should call A::func(int)
         self.expect_expr("func(10)", result_type="int", result_value="13")
         # Evaluate B::func() - should call B::func()
         self.expect_expr("B::func()", result_type="int", result_value="4")
         # Evaluate func() - should call A::func()