zephyr: Add module.yml for Zephyr module integration

module.yaml added as required for Zephyr's integration as a module.

Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
diff --git a/zephyr/module.yml b/zephyr/module.yml
new file mode 100644
index 0000000..7850f8b
--- /dev/null
+++ b/zephyr/module.yml
@@ -0,0 +1,2 @@
+samples:
+  - boot/zephyr