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:

  e128ea78e5

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

package/python3/004-old-stdlib-cache.patch

@@ -50,7 +50,7 @@ Index: b/Makefile.pre.in
  # Environment to run shared python without installed libraries
  RUNSHARED=       @RUNSHARED@
  
-@@ -1246,21 +1249,21 @@
+@@ -1247,21 +1250,21 @@
  	fi
  	-PYTHONPATH=$(DESTDIR)$(LIBDEST)  $(RUNSHARED) \
  		$(PYTHON_FOR_BUILD) -Wi $(DESTDIR)$(LIBDEST)/compileall.py \