[pulse] rename function that was never a pulse FP

Summary: Naming it `FP_` was a mistake in the original commit that copied the tests over as pulse has never reported on that method.

Reviewed By: da319

Differential Revision: D13465324

fbshipit-source-id: f8b24ebda

infer/tests/codetoanalyze/cpp/pulse/use_after_destructor.cpp

@@ -231,8 +231,7 @@ struct A2 {
   const B* f;
 };
 
-// need interprocedural analysis to fix this
+void destructor_order_empty_destructor_ok() {
-void FP_destructor_order_empty_destructor_ok() {
   A2 a;
   B b;
   a.f = &b;