add missing spec for singles/python/shell_bind_tcp

Author: jmartin-tech

spec/modules/payloads_spec.rb

@@ -2370,6 +2370,16 @@
                           reference_name: 'python/meterpreter_reverse_tcp'
   end
 
+  context 'python/shell_bind_tcp' do
+    it_should_behave_like 'payload cached size is consistent',
+                          ancestor_reference_names: [
+                              'singles/python/shell_bind_tcp'
+                          ],
+                          dynamic_size: false,
+                          modules_pathname: modules_pathname,
+                          reference_name: 'python/shell_bind_tcp'
+  end
+
   context 'python/shell_reverse_tcp' do
     it_should_behave_like 'payload cached size is consistent',
                           ancestor_reference_names: [