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/simplify_option_ptr.cpp

@@ -0,0 +1,30 @@
+#include <cstdarg>
+#include <cstdint>
+#include <cstdlib>
+#include <ostream>
+#include <new>
+
+struct Opaque;
+
+template<typename T = void>
+struct Option;
+
+struct Foo {
+  const Opaque *x;
+  Opaque *y;
+  void (*z)();
+  void (**zz)();
+};
+
+union Bar {
+  const Opaque *x;
+  Opaque *y;
+  void (*z)();
+  void (**zz)();
+};
+
+extern "C" {
+
+void root(const Opaque *a, Opaque *b, Foo c, Bar d, Option<Opaque*> *e, void (*f)(const Opaque*));
+
+} // extern "C"