This patch was generating by running `2to3` on the files in the lldb/test directory. This patch should be NFC, but it does introduce the `from __future__ import print_function` line, which will break future uses of the print statement. This patch does not address every python 2 / python 3 incompatibility. Some are more mechanical than others, so I plan to do this in stages. The first pass fixes only print statements. Other incompatibilities will addressed in followup patches.