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/rust/fns.rs

@@ -0,0 +1,16 @@
+#[repr(C)]
+pub struct Fns {
+  noArgs: fn(),
+  anonymousArg: fn(i32),
+  returnsNumber: fn() -> i32,
+  namedArgs: fn(first: i32, snd: i16) -> i8,
+  namedArgsWildcards: fn(_: i32, named: i16, _: i64) -> i8,
+}
+
+#[no_mangle]
+pub extern "C" fn root(_fns: Fns) {}
+
+#[no_mangle]
+pub extern "C" fn no_return() -> ! {
+    loop {}
+}