tree 23c9fc3023a9bcb470cbac468ec9aaeb456dcac4
parent efc600b4abec1f8a7a12d60303735b4d3478d816
author David Brazdil <dbrazdil@google.com> 1579875465 +0000
committer David Brazdil <dbrazdil@google.com> 1579875465 +0000

Switch hftest.py to python3

Python scripts used by GN have already been moved to Python 3 in
a previous CL. hftest.py slipped through the cracks.

Change its hashbang directive and fix use of ElementTree.write()
which now expects a file name, rather than an open file object.

Change-Id: I8719acabf92d525ab0932aadf3aa0e58b4690b4c