RPM build fix (reverted CI changes which will need to be un-reverted or made conditional) and vendor Rust dependencies to make builds much faster in any CI system.

zeroidc/vendor/cbindgen/tests/expectations/opaque.cpp

@@ -0,0 +1,42 @@
+#if 0
+''' '
+#endif
+
+#ifdef __cplusplus
+// These could be added as opaque types I guess.
+template <typename T>
+struct BuildHasherDefault;
+
+struct DefaultHasher;
+#endif
+
+#if 0
+' '''
+#endif
+
+
+#include <cstdarg>
+#include <cstdint>
+#include <cstdlib>
+#include <ostream>
+#include <new>
+
+template<typename K = void, typename V = void, typename Hasher = void>
+struct HashMap;
+
+template<typename T = void, typename E = void>
+struct Result;
+
+/// Fast hash map used internally.
+template<typename K, typename V>
+using FastHashMap = HashMap<K, V, BuildHasherDefault<DefaultHasher>>;
+
+using Foo = FastHashMap<int32_t, int32_t>;
+
+using Bar = Result<Foo>;
+
+extern "C" {
+
+void root(const Foo *a, const Bar *b);
+
+} // extern "C"