bitbake-dev: Sync with changes upstream

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

bitbake-dev/bin/bitbake

@@ -48,6 +48,17 @@ class BBConfiguration( object ):
             setattr( self, key, val )
 
 
+def print_exception(exc, value, tb):
+    """
+    Print the exception to stderr, only showing the traceback if bitbake
+    debugging is enabled.
+    """
+    if not bb.msg.debug_level['default']:
+        tb = None
+
+    sys.__excepthook__(exc, value, tb)
+
+
 #============================================================================#
 # main
 #============================================================================#