fixed hashing

pym/update/emerge_parser.py

@@ -756,7 +756,7 @@ class MtimeCheckvalue():
 
 class Md5Checkvalue(MtimeCheckvalue):
     def value_func(self, fn):
-        return hashlib.md5(readFile(fn)).hexdigest()
+        return hashlib.md5(readFile(fn, binary=True)).hexdigest()
 
 
 class GitCheckvalue():