convert to print function

Newer repo's sometimes import the print function on us, and then import
these python files directly which then throws an error.  Convert us to
the print function to avoid it.  It's not a bad thing.

BUG=None
TEST=`./pre-upload_unittest.py` passes

Change-Id: I8c99ef48bfae22cbbabcf03cca4ff968661c1ad2
Previously-Reviewed-on: https://chromium-review.googlesource.com/172340
Reviewed-on: https://chromium-review.googlesource.com/194376
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
2 files changed