[Bug fix]Update backend/__init__.py (#2780)

* Update __init__.py

Signed-off-by: Galaxy1458 <55453380+Galaxy1458@users.noreply.github.com>

* Add blank line

Signed-off-by: Galaxy1458 <55453380+Galaxy1458@users.noreply.github.com>

---------

Signed-off-by: Galaxy1458 <55453380+Galaxy1458@users.noreply.github.com>

Author: Galaxy1458

src/flag_gems/runtime/backend/__init__.py

@@ -40,6 +40,7 @@ def __init__(self):
 
 # Global singleton instance
 _state = BackendState()
+vendor_module = _state.vendor_module
 
 
 class BackendArchEvent: