Add more info to who called SuspendAll

Helps diagnose related jank.

Change-Id: I38191cdda723c6f0355d0197c494a3dff2b6653c
diff --git a/runtime/hprof/hprof.cc b/runtime/hprof/hprof.cc
index 5a7b7e1..b822613 100644
--- a/runtime/hprof/hprof.cc
+++ b/runtime/hprof/hprof.cc
@@ -1180,7 +1180,7 @@
     // comment in Heap::VisitObjects().
     heap->IncrementDisableMovingGC(self);
   }
-  Runtime::Current()->GetThreadList()->SuspendAll();
+  Runtime::Current()->GetThreadList()->SuspendAll(__FUNCTION__);
   Hprof hprof(filename, fd, direct_to_ddms);
   hprof.Dump();
   Runtime::Current()->GetThreadList()->ResumeAll();