[platform] fixes shell environment loading under Python 3 (IDEA-192345)

bin/mac/printenv.py

@@ -12,6 +12,8 @@ if len(sys.argv) != 2:
 f = open(sys.argv[1], 'w')
 try:
     for key, value in os.environ.items():
+        if isinstance(key, unicode): key = key.encode('utf-8')
+        if isinstance(value, unicode): value = value.encode('utf-8')
         f.writelines([key, '=', value, '\0'])
 finally:
     f.close()