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/union.cpp

@@ -0,0 +1,23 @@
+#include <cstdarg>
+#include <cstdint>
+#include <cstdlib>
+#include <ostream>
+#include <new>
+
+struct Opaque;
+
+union Normal {
+  int32_t x;
+  float y;
+};
+
+union NormalWithZST {
+  int32_t x;
+  float y;
+};
+
+extern "C" {
+
+void root(Opaque *a, Normal b, NormalWithZST c);
+
+} // extern "C"