Add num-derive/OWNERS

Test: make
Change-Id: Ia487dc398be70a9222997f4446bd00565cc814ad
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