python-sip: bump to version 4.18

Signed-off-by: Akihiko Odaki <akihiko.odaki.4i@stu.hosei.ac.jp>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/python-sip/python-sip.hash

@@ -1,4 +1,4 @@
-# From http://sourceforge.net/projects/pyqt/files/sip/sip-4.16.7/
-md5 32abc003980599d33ffd789734de4c36	sip-4.16.7.tar.gz
+# From https://sourceforge.net/projects/pyqt/files/sip/sip-4.18/
+md5 78724bf2a79878201c3bc81a1d8248ea	sip-4.18.tar.gz
 # Locally calculated:
-sha256 4caa8d52e4403bae5c4c64f44de03a2cfd0bb10b6d96c5fb771133516df9abbd	sip-4.16.7.tar.gz
+sha256 f1dc5c81c07a9ad97edcd4a0af964a41e420024ba7ca165afd2b351efd249cb6	sip-4.18.tar.gz

package/python-sip/python-sip.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-PYTHON_SIP_VERSION = 4.16.7
+PYTHON_SIP_VERSION = 4.18
 PYTHON_SIP_SOURCE = sip-$(PYTHON_SIP_VERSION).tar.gz
 PYTHON_SIP_SITE = http://downloads.sourceforge.net/project/pyqt/sip/sip-$(PYTHON_SIP_VERSION)
 PYTHON_SIP_LICENSE = SIP license or GPLv2 or GPLv3