Fix the stack limits setting API so it is usable.

src/v8.cc

Index: src/v8.cc
===================================================================
--- src/v8.cc	(revision 2982)
+++ src/v8.cc	(working copy)
@@ -71,6 +71,14 @@
   ::assembler::arm::Simulator::Initialize();
 #endif
 
+  { // NOLINT
+    // Ensure that the thread has a valid stack guard.  The v8::Locker object
+    // will ensure this too, but we don't have to use lockers if we are only
+    // using one thread.
+    ExecutionAccess lock;
+    StackGuard::InitThread(lock);
+  }
+
   // Setup the object heap
   ASSERT(!Heap::HasBeenSetup());
   if (!Heap::Setup(create_heap_objects)) {