QML UI: use Kirigami 2.1

In order to avoid surprises with things suddenly breaking, check out
the release tag of Kirigami 2.1 for now. We still need to track what's
happening in Kirigami, but this was Marco's advise as well.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

scripts/mobilecomponents.sh

@@ -32,6 +32,7 @@ if [ "$NOPULL" = "" ] ; then
 	pushd kirigami
 	git checkout master
 	git pull origin master
+	git checkout v2.1.0
 	popd
 fi
 if [ ! -d breeze-icons ] ; then