bitbake: lib: Clean up various file access syntax

Python 3 is stricter about how files are accessed. Specficially:

 * Use open(), not file()
 * Use binary mode for binary files (when checksumming)
 * Use with statements to ensure files get closed
 * Add missing file close statements

(Bitbake rev: 9f08b901375ba640f47596f1bcf43f98a931550f)

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

bitbake/lib/bb/process.py

@@ -102,6 +102,10 @@ def _logged_communicate(pipe, log, input):
                     log.write(data)
     finally:    
         log.flush()
+    if pipe.stdout is not None:
+        pipe.stdout.close()
+    if pipe.stderr is not None:
+        pipe.stderr.close()
     return ''.join(outdata), ''.join(errdata)
 
 def run(cmd, input=None, log=None, **options):