Adds the BUILD rule to expose the kotlin plugin

Change-Id: Ie779bfc85ada3841774e6376eda109204e237962
diff --git a/common/kotlin-plugin/BUILD b/common/kotlin-plugin/BUILD
new file mode 100644
index 0000000..0a24bf0
--- /dev/null
+++ b/common/kotlin-plugin/BUILD
@@ -0,0 +1 @@
+exports_files(glob(["kotlin-plugin*.zip"]));