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/zst.cpp

@@ -0,0 +1,16 @@
+#include <cstdarg>
+#include <cstdint>
+#include <cstdlib>
+#include <ostream>
+#include <new>
+
+struct TraitObject {
+  void *data;
+  void *vtable;
+};
+
+extern "C" {
+
+void *root(const void *ptr, TraitObject t);
+
+} // extern "C"