Add a super simple typescript example

Change-Id: I1014a889a3bb74f291a214966b32cd21e791ed7c
diff --git a/BUILD b/BUILD
new file mode 100644
index 0000000..4509a20
--- /dev/null
+++ b/BUILD
@@ -0,0 +1 @@
+exports_files(["tsconfig.json"])