[clang-rename] make clang-rename.py vim integration python3 compatible
Summary:
This patch makes the clang-rename.py script useable for vim with only python3
support. It uses the print-function and adjust the doc slightly to mention
the correct python3 command for the letter mapping in vim.
Reviewers: arphaman, klimek, aaron.ballman, hokein
Reviewed By: hokein
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D50307
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@338996
91177308-0d34-0410-b5e6-
96231b3b80d8