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/nonnull.c

@@ -0,0 +1,20 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef struct Opaque Opaque;
+
+typedef struct {
+  float *a;
+  uint64_t *b;
+  Opaque *c;
+  uint64_t **d;
+  float **e;
+  Opaque **f;
+  uint64_t *g;
+  int32_t *h;
+  int32_t **i;
+} Foo_u64;
+
+void root(int32_t *arg, Foo_u64 *foo, Opaque **d);