fix: use print() function in both Python 2 and Python 3 (#18395)

Legacy print statements are syntax errors in Python 3 but print() function works as expected in both Python 2 and Python 3.

Old style exceptions are syntax errors in Python 3 but new style exceptions work as expected in both Python 2 and Python 3.

build/zip.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+from __future__ import print_function
 import os
 import subprocess
 import sys
@@ -41,7 +42,7 @@ def execute(argv):
     output = subprocess.check_output(argv, stderr=subprocess.STDOUT)
     return output
   except subprocess.CalledProcessError as e:
-    print e.output
+    print(e.output)
     raise e
 
 def main(argv):