Add a bug component for test vts_libsnapshot_test.

Test: Tree Hugger
Bug: 143903671
Change-Id: Ifaa406f6c7a94c4eb615ddc146119c12359ad198
diff --git a/fs_mgr/libsnapshot/OWNERS b/fs_mgr/libsnapshot/OWNERS
index 801c446..37319fe 100644
--- a/fs_mgr/libsnapshot/OWNERS
+++ b/fs_mgr/libsnapshot/OWNERS
@@ -1,3 +1,4 @@
+# Bug component: 30545
 balsini@google.com
 dvander@google.com
 elsk@google.com