bitbake: knotty: Add logging cleanup

Adds code to close all loggers when bitbake exits. This prevents
unclosed file ResourceWarnings. A form of this closing existed
previously, but was removed in the new logging code.

(Bitbake rev: b3f3779adf63c0d970462a558a6205da1d30c0ed)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/ui/knotty.py

@@ -823,4 +823,6 @@ def main(server, eventHandler, params, tf = TerminalFilter):
         if e.errno == errno.EPIPE:
             pass
 
+    bb.msg.cleanupLogging()
+
     return return_value