unified: Also mention OS/arch instead of just OS

Author: asgerf

unified/extractor-unsupported-os/src/main.rs

@@ -1,4 +1,4 @@
 fn main() {
-    eprintln!("Unsupported OS. Extraction is not currently supported on this platform.");
+    eprintln!("Unsupported OS/arch. Extraction is not currently supported on this platform.");
     std::process::exit(1);
 }