try msvc pauth fix

Author: ZuseZ4

tests/run-make/pointer-auth-link-with-c/rmake.rs

@@ -15,9 +15,16 @@ use run_make_support::{build_native_static_lib, cc, is_windows_msvc, llvm_ar, ru
 
 fn main() {
     build_native_static_lib("test");
+
+    let branch_protection = if is_windows_msvc() {
+        "-Zbranch-protection=bti,gcs,pac-ret,leaf,b-key"
+    } else {
+        "-Zbranch-protection=bti,gcs,pac-ret,leaf"
+    };
+
     rustc()
         .arg("-Cunsafe-allow-abi-mismatch=branch-protection")
-        .arg("-Zbranch-protection=bti,gcs,pac-ret,leaf")
+        .arg(branch_protection)
         .input("test.rs")
         .run();
     run("test");
@@ -31,7 +38,7 @@ fn main() {
     llvm_ar().obj_to_ar().output_input("libtest.a", &obj_file).run();
     rustc()
         .arg("-Cunsafe-allow-abi-mismatch=branch-protection")
-        .arg("-Zbranch-protection=bti,gcs,pac-ret,leaf")
+        .arg(branch_protection)
         .input("test.rs")
         .run();
     run("test");