python-crossbar: add missing runtime dependency

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/python-crossbar/Config.in

@@ -4,6 +4,7 @@ config BR2_PACKAGE_PYTHON_CROSSBAR
 	# All the following dependencies are runtime dependencies
 	select BR2_PACKAGE_PYTHON_ATTRS
 	select BR2_PACKAGE_PYTHON_AUTOBAHN
+	select BR2_PACKAGE_PYTHON_BITSTRING
 	select BR2_PACKAGE_PYTHON_CONSTANTLY
 	select BR2_PACKAGE_PYTHON_CBOR
 	select BR2_PACKAGE_PYTHON_CLICK