Additional bazel build files for apps

Change-Id: If3f31139022b5657e4a7b8a33871e4eba0da286e
diff --git a/apps/pi-demo/common/BUILD b/apps/pi-demo/common/BUILD
new file mode 100644
index 0000000..01d59ae
--- /dev/null
+++ b/apps/pi-demo/common/BUILD
@@ -0,0 +1,3 @@
+osgi_jar(
+    deps = CORE_DEPS,
+)