bisect: Return proper error code on kci-dev execution error

While possibility of this exception low, we need to detect this
situation as error by kci-dev returning proper exit code.

Signed-off-by: Denys Fedoryshchenko <denys.f@collabora.com>

Author: nuclearcat

kcidev/subcommands/bisect.py

@@ -226,7 +226,7 @@ def bisection_loop(state):
     except Exception as e:
         logging.error(f"Error getting return code from kci-dev: {e}")
         kci_err(f"Error executing kci-dev, no returncode: {e}")
-        sys.exit
+        sys.exit(1)
 
     logging.info(f"Test completed with return code: {testret}")