Update to OSTree 2020.5

rust-bindings/rust/sys/tests/abi.rs

@@ -304,6 +304,7 @@ const RUST_CONSTANTS: &[(&str, &str)] = &[
     ("(gint) OSTREE_DEPLOYMENT_UNLOCKED_DEVELOPMENT", "1"),
     ("(gint) OSTREE_DEPLOYMENT_UNLOCKED_HOTFIX", "2"),
     ("(gint) OSTREE_DEPLOYMENT_UNLOCKED_NONE", "0"),
+    ("(gint) OSTREE_DEPLOYMENT_UNLOCKED_TRANSIENT", "3"),
     ("(guint) OSTREE_DIFF_FLAGS_IGNORE_XATTRS", "1"),
     ("(guint) OSTREE_DIFF_FLAGS_NONE", "0"),
     ("OSTREE_DIRMETA_GVARIANT_STRING", "(uuua(ayay))"),