xcb-proto: add upstream patch for python3.5 build failure

xcb-proto: add upstream patch for python3.5 build failure

Since we run compileall on all python files in TARGET_DIR as part of
the finalization, the align.py from xcb-proto will be compiled (it is
not compiled as part of the package build). This file contains mixed
tab-spaces indentation, which python 3.5 no longer allows.

Add an upstream patch that cleans up the indentation in this file.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>