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/must_use.cpp

@@ -0,0 +1,38 @@
+#define MUST_USE_FUNC __attribute__((warn_unused_result))
+#define MUST_USE_STRUCT __attribute__((warn_unused))
+#define MUST_USE_ENUM /* nothing */
+
+
+#include <cstdarg>
+#include <cstdint>
+#include <cstdlib>
+#include <ostream>
+#include <new>
+
+template<typename T>
+struct MUST_USE_STRUCT MaybeOwnedPtr {
+  enum class MUST_USE_ENUM Tag : uint8_t {
+    Owned,
+    None,
+  };
+
+  struct Owned_Body {
+    T *_0;
+  };
+
+  Tag tag;
+  union {
+    Owned_Body owned;
+  };
+};
+
+template<typename T>
+struct MUST_USE_STRUCT OwnedPtr {
+  T *ptr;
+};
+
+extern "C" {
+
+MUST_USE_FUNC MaybeOwnedPtr<int32_t> maybe_consume(OwnedPtr<int32_t> input);
+
+} // extern "C"