[K/N] Add trivial test for llvm.objc.clang.arc.use lowering

kotlin-native/backend.native/tests/interop/objc_arc_contract/main.ll

@@ -0,0 +1,9 @@
+; Prevent function from DCE
+@llvm.compiler.used = appending global [1 x i8*] [ i8* bitcast (void (i8*, i8*)* @test to i8*) ], section "llvm.metadata"
+
+declare void @llvm.objc.clang.arc.use(...) nounwind
+
+define void @test(i8* %a, i8* %b) {
+  call void (...) @llvm.objc.clang.arc.use(i8* %a, i8* %b) nounwind
+  ret void
+}