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/bin/bitbake-layers

@@ -654,7 +654,7 @@ build results (as the layer priority order has effectively changed).
                                     logger.plain('  Skipping layer config file %s' % f1full )
                                     continue
                                 else:
-                                    logger.warn('Overwriting file %s', fdest)
+                                    logger.warning('Overwriting file %s', fdest)
                             bb.utils.copyfile(f1full, fdest)
                             if ext == '.bb':
                                 for append in self.bbhandler.cooker.collection.get_file_appends(f1full):
@@ -790,8 +790,8 @@ Lists recipes with the bbappends that apply to them as subitems.
 
             if best_filename:
                 if best_filename in missing:
-                    logger.warn('%s: missing append for preferred version',
-                                best_filename)
+                    logger.warning('%s: missing append for preferred version',
+                                   best_filename)
             return True
         else:
             return False

bitbake/bin/bitbake-worker

@@ -364,7 +364,7 @@ class BitbakeWorker(object):
     def handle_ping(self, _):
         workerlog_write("Handling ping\n")
 
-        logger.warn("Pong from bitbake-worker!")
+        logger.warning("Pong from bitbake-worker!")
 
     def handle_quit(self, data):
         workerlog_write("Handling quit\n")