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/mangle.cpp

@@ -0,0 +1,18 @@
+#include <cstdarg>
+#include <cstdint>
+#include <cstdlib>
+#include <ostream>
+#include <new>
+
+template<typename T>
+struct Foo {
+  T a;
+};
+
+using Boo = Foo<uint8_t>;
+
+extern "C" {
+
+void root(Boo x);
+
+} // extern "C"