python3: bump to version 3.4.3

All patches are simply refreshed, except
002-properly-detect-if-python-build.patch which is removed because an
identical fix has been merged upstream:

  https://github.com/python/cpython/commit/e128ea78e5964929ca902bebc07c242d58609dfc



Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>