cooker: Fix parse progress for python3

Under python the type conversions can mean there are float values
used for triggering the parse progress events which then fails.
Add an explict int() conversion to ensure the parse events are
generated under python3.

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

lib/bb/cooker.py

@@ -2020,7 +2020,7 @@ def __init__(self, cooker, filelist, masked):
             else:
                 self.fromcache.append((filename, appends))
         self.toparse = self.total - len(self.fromcache)
-        self.progress_chunk = max(self.toparse / 100, 1)
+        self.progress_chunk = int(max(self.toparse / 100, 1))
 
         self.num_processes = min(int(self.cfgdata.getVar("BB_NUMBER_PARSE_THREADS", True) or
                                  multiprocessing.cpu_count()), len(self.willparse))