[watchos] Fix broken target arm64_32-apple-watchos

Issue rust-lang#111217

Author: vladimir-ea

compiler/rustc_codegen_ssa/src/back/metadata.rs

@@ -101,7 +101,7 @@ pub(crate) fn create_object_file(sess: &Session) -> Option<write::Object<'static
     let architecture = match &sess.target.arch[..] {
         "arm" => Architecture::Arm,
         "aarch64" => {
-            if sess.target.pointer_width == 32 {
+            if sess.target.pointer_width == 32 && sess.target.os != "watchos" {
                 Architecture::Aarch64_Ilp32
             } else {
                 Architecture::Aarch64