Skip parallel recompilation tests if parallel recompilation is disabled.

test/mjsunit/compiler/parallel-proto-change.js

Index: test/mjsunit/compiler/parallel-proto-change.js
diff --git a/test/mjsunit/compiler/parallel-proto-change.js b/test/mjsunit/compiler/parallel-proto-change.js
index aa1ac6de90952c3a0f5e2e3ea28c4f1d1dcdd9f1..2392a37c95504e94c6688e9d048118e0e376c77a 100644
--- a/test/mjsunit/compiler/parallel-proto-change.js
+++ b/test/mjsunit/compiler/parallel-proto-change.js
@@ -28,6 +28,11 @@
 // Flags: --allow-natives-syntax
 // Flags: --parallel-recompilation --parallel-recompilation-delay=50
 
+if (!%IsParallelRecompilationSupported()) {
+  print("Parallel recompilation is disabled. Skipping this test.");
+  quit();
+}
+
 function assertUnoptimized(fun) {
   assertTrue(%GetOptimizationStatus(fun) != 1);
 }