Support C++ and Rust interop with autocxx

Change-Id: Id2c852bf48ed58d6284e7ab8a388ac38419fc474
Signed-off-by: Brian Silverman <bsilver16384@gmail.com>
diff --git a/build_tests/hello_autocxx.rs b/build_tests/hello_autocxx.rs
new file mode 100644
index 0000000..483f8be
--- /dev/null
+++ b/build_tests/hello_autocxx.rs
@@ -0,0 +1,16 @@
+use autocxx::include_cpp;
+
+include_cpp! (
+#include "build_tests/hello_autocxx.h"
+generate!("plain_function")
+);
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_plain_function() {
+        assert_eq!(autocxx::c_int::from(971), unsafe { ffi::plain_function() });
+    }
+}