Add async-trait/OWNERS

Test: make
Change-Id: If2e45a61d872f9d17818fb80559877abbe854474
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..46fc303
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1 @@
+include platform/prebuilts/rust:/OWNERS