Add cryptography.x509

generate_cert_bundle.py: Add cryptography.x509 to avoid ci-pio compile error

Author: ewowi

scripts/generate_cert_bundle.py

@@ -28,6 +28,9 @@
     from cryptography.hazmat.primitives import serialization
 except ImportError:
     env.Execute("$PYTHONEXE -m pip install cryptography")
+    from cryptography import x509
+    from cryptography.hazmat.backends import default_backend
+    from cryptography.hazmat.primitives import serialization
 
 
 ca_bundle_bin_file = 'x509_crt_bundle.bin'