python-tornado: bump to 4.2

Add md5 from pypi.python.org.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/python-tornado/python-tornado.hash

@@ -1,2 +1,3 @@
-# Locally computed:
-sha256  99abd3aede45c93739346ee7384e710120121c3744da155d5cff1c0101702228  tornado-4.1.tar.gz
+# md5 from https://pypi.python.org/pypi?:action=show_md5&digest=c548d7b77a11d523c3d7255bd7fd6df8, sha256 locally computed
+md5     c548d7b77a11d523c3d7255bd7fd6df8 tornado-4.2.tar.gz
+sha256  e8b1207da67dbdceebfb291292b4ef1b547d6171525bec1b366853f923456a5f  tornado-4.2.tar.gz

package/python-tornado/python-tornado.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-PYTHON_TORNADO_VERSION = 4.1
+PYTHON_TORNADO_VERSION = 4.2
 PYTHON_TORNADO_SOURCE = tornado-$(PYTHON_TORNADO_VERSION).tar.gz
 PYTHON_TORNADO_SITE = https://pypi.python.org/packages/source/t/tornado
 PYTHON_TORNADO_LICENSE = Apache-2.0