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/mod_2018.both.c

@@ -0,0 +1,20 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#define EXPORT_ME_TOO 42
+
+typedef struct ExportMe {
+  uint64_t val;
+} ExportMe;
+
+typedef struct ExportMe2 {
+  uint64_t val;
+} ExportMe2;
+
+void export_me(struct ExportMe *val);
+
+void export_me_2(struct ExportMe2*);
+
+void from_really_nested_mod(void);