include gummikraken test service in build

[rpi_small] / gummikraken

diff --git a/gummikraken b/gummikraken
new file mode 160000 (submodule)
index 0000000..f2e800e
--- /dev/null
+++ b/gummikraken
@@ -0,0 +1 @@
+Subproject commit f2e800ebee1fbfebbc00dafd484da78afc47eaee