Migrate keystore2's Rust system library bindings to bionic.

This is purely a port: it does not add or change any functionality
(other than renaming the library).

Bug: 182498247
Test: Use library.
Change-Id: I4cb8f1c22ca4ca5a398116952fb9957d283d235b
diff --git a/libc/rust/system_properties_bindgen.hpp b/libc/rust/system_properties_bindgen.hpp
new file mode 100644
index 0000000..307cd6c
--- /dev/null
+++ b/libc/rust/system_properties_bindgen.hpp
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "sys/system_properties.h"