Add more info to who called SuspendAll

Helps diagnose related jank.

Change-Id: I38191cdda723c6f0355d0197c494a3dff2b6653c
diff --git a/runtime/instrumentation.cc b/runtime/instrumentation.cc
index 085062c..b53b8cd 100644
--- a/runtime/instrumentation.cc
+++ b/runtime/instrumentation.cc
@@ -607,7 +607,7 @@
   Locks::mutator_lock_->AssertNotHeld(self);
   Locks::instrument_entrypoints_lock_->AssertHeld(self);
   if (runtime->IsStarted()) {
-    tl->SuspendAll();
+    tl->SuspendAll(__FUNCTION__);
   }
   {
     MutexLock mu(self, *Locks::runtime_shutdown_lock_);