python-meld3: fix setup type

meld3 relies on setuptools instead of distutils.

Fixes:
http://autobuild.buildroot.net/results/f9e/f9ef01d2cb1d32cb13743e83c7fc9c0d354fc571/

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

package/python-meld3/python-meld3.mk

@@ -9,6 +9,6 @@ PYTHON_MELD3_SOURCE = meld3-$(PYTHON_MELD3_VERSION).tar.gz
 PYTHON_MELD3_SITE = https://pypi.python.org/packages/45/a0/317c6422b26c12fe0161e936fc35f36552069ba8e6f7ecbd99bbffe32a5f
 PYTHON_MELD3_LICENSE = ZPLv2.1
 PYTHON_MELD3_LICENSE_FILES = COPYRIGHT.txt LICENSE.txt
-PYTHON_MELD3_SETUP_TYPE = distutils
+PYTHON_MELD3_SETUP_TYPE = setuptools
 
 $(eval $(python-package))