Added missing cache failed notification

Added a missing call to _resolv_cache_query_failed for another fail
case where it was missing (it doesn't go through the error handling
under the "fail" label). This missing notification caused requests to
have to wait for timeout instead of beeing notified on some failed

Change-Id: I904d60269c59b926784e3a397d2a860329f55142
1 file changed