python: make the python 3.x version of 2to3 utility the default one

(From OE-Core rev: 98ba7ba8c5bc091f5cc590299f1a636c9b8dc1f5)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python_2.7.15.bb

@@ -131,6 +131,9 @@ do_install() {
     if [ -z "${@bb.utils.filter('PACKAGECONFIG', 'bdb', d)}" ]; then
         rm -rf ${D}/${libdir}/python${PYTHON_MAJMIN}/bsddb
     fi
+
+    # Python 3.x version of 2to3 is now the default
+    mv ${D}/${bindir}/2to3 ${D}/${bindir}/2to3-${PYTHON_MAJMIN}
 }
 
 do_install_append_class-nativesdk () {