bitbake: server/process: Don't log BBHandledException

If we see a BBHandledException in the idle handler, the understanding
is the system handled it, printing a log and traceback is just confusing.

Therefore only print these in the cases where its an unknown/unhandled
exception.

(Bitbake rev: d88ecc2bc44dce8fd92ca3a2c0fd4124a5e464fa)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/server/process.py

@@ -144,8 +144,9 @@ class ProcessServer(Process, BaseImplServer):
                     fds = fds + retval
             except SystemExit:
                 raise
-            except Exception:
-                logger.exception('Running idle function')
+            except Exception as exc:
+                if not isinstance(exc, bb.BBHandledException):
+                    logger.exception('Running idle function')
                 del self._idlefuns[function]
                 self.quit = True