bitbake: bitbake: Update logger.warn() -> logger.warning()

python deprecated logger.warn() in favour of logger.warning(). This is only
used in bitbake code so we may as well just translate everything to avoid
warnings under python 3. Its safe for python 2.7.

(Bitbake rev: 676a5f592e8507e81b8f748d58acfea7572f8796)

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

bitbake/lib/bb/runqueue.py

@@ -824,7 +824,7 @@ class RunQueueData:
                     msg += "\n%s has unique rprovides:\n  %s" % (provfn, "\n  ".join(rprovide_results[provfn] - commonrprovs))
 
                 if self.warn_multi_bb:
-                    logger.warn(msg)
+                    logger.warning(msg)
                 else:
                     logger.error(msg)
 
@@ -852,7 +852,7 @@ class RunQueueData:
             taskdep = self.dataCache.task_deps[fn]
             fnid = self.taskData.getfn_id(fn)
             if taskname not in taskData.tasks_lookup[fnid]:
-                logger.warn("Task %s does not exist, invalidating this task will have no effect" % taskname)
+                logger.warning("Task %s does not exist, invalidating this task will have no effect" % taskname)
             if 'nostamp' in taskdep and taskname in taskdep['nostamp']:
                 if error_nostamp:
                     bb.fatal("Task %s is marked nostamp, cannot invalidate this task" % taskname)