Cleanup createTrack error handling

Similar to cleanup done earlier for openRecord in this CL:
    > Change-Id: I84897dd7d30b370640b54e928f230604b873cb68

Bug: 10888816
Change-Id: I804a47f898e0319a60a9bd58906bbb037e45cc25
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 01b90a8..b191a8f 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -1339,6 +1339,7 @@
         // but TimedTrack::create() is a factory that could fail by returning NULL
         lStatus = track != 0 ? track->initCheck() : (status_t) NO_MEMORY;
         if (lStatus != NO_ERROR) {
+            ALOGE("createTrack_l() initCheck failed %d; no control block?", lStatus);
             track.clear();
             goto Exit;
         }