X87: [FeedbackVector] Infrastructure for literal arrays in the vector.

  port 38602f1f (r42146)

  original commit message:
  This changes the NewClosure interface descriptor, but ignores
  the additional vector/slot arguments for now. The feedback vector
  gets larger, as it holds a space for each literal array. A follow-on
  CL will constructively use this space.

BUG=

Review-Url: https://codereview.chromium.org/2616403007
Cr-Commit-Position: refs/heads/master@{#42157}

src/x87/interface-descriptors-x87.cc

@@ -64,7 +64,8 @@ const Register GrowArrayElementsDescriptor::KeyRegister() { return ebx; }
 
 void FastNewClosureDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {ebx};
+  // SharedFunctionInfo, vector, slot index.
+  Register registers[] = {ebx, ecx, edx};
   data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
 }