bitbake-layers: hide deprecation warnings

There are a number of DeprecationWarnings within BitBake code which
bitbake itself filters out; bitbake-layers was not doing this, resulting
in a stream of warnings printed out when used with Python < 2.7 (these
warnings default to disabled on version 2.7 and above.)

(Bitbake rev: 0a2378237f07eb1c812e2308e64b7d70781e2b39)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/bin/bitbake-layers

@@ -9,6 +9,7 @@
 
 import cmd
 import logging
+import warnings
 import os
 import sys
 import fnmatch
@@ -28,6 +29,7 @@ import bb.fetch2
 
 logger = logging.getLogger('BitBake')
 
+warnings.filterwarnings("ignore", category=DeprecationWarning)
 
 def main(args):
     # Set up logging