Fix bug in tail call of builtin in the ToNumber stub on ARM.

Review URL: http://codereview.chromium.org/6255017

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6529 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/code-stubs-arm.cc

@@ -70,9 +70,7 @@ void ToNumberStub::Generate(MacroAssembler* masm) {
   __ Ret();
 
   __ bind(&call_builtin);
-  __ pop(r2);  // Pop return address.
   __ push(r0);
-  __ push(r2);  // Push return address.
   __ InvokeBuiltin(Builtins::TO_NUMBER, JUMP_JS);
 }