Fixed #25680 -- Added django-admin shell --command option.

Add a -c option to the shell command to execute a command passed as a
string as Django.

tests/shell/tests.py

@@ -0,0 +1,19 @@
+from django import __version__
+from django.core.management import call_command
+from django.test import SimpleTestCase
+from django.test.utils import patch_logger
+
+
+class ShellCommandTestCase(SimpleTestCase):
+
+    def test_command_option(self):
+        with patch_logger('test', 'info') as logger:
+            call_command(
+                'shell',
+                command=(
+                    'import django; from logging import getLogger; '
+                    'getLogger("test").info(django.__version__)'
+                ),
+            )
+            self.assertEqual(len(logger), 1)
+            self.assertEqual(logger[0], __version__)