Suppress yet another wrong-locking report in NSS

tools/valgrind/tsan/suppressions.txt

 ############################
 # Chromium
 
 {
   bug_23433
   ThreadSanitizer:Race
   fun:*logging*SetMinLogLevel*
 }
 
 {
@@ skipping 129 matching lines @@
   fun:scoped_ptr<talk_base::SocketServer>::~scoped_ptr()
   fun:talk_base::MessageQueue::~MessageQueue()
   fun:talk_base::Thread::~Thread()
   fun:talk_base::ThreadManager::UnwrapCurrentThread()
   fun:talk_base::ThreadManager::~ThreadManager()
   fun:__tcf_0
   fun:exit
 }
 
 {
-  bug_61585
+  bug_61585a
   ThreadSanitizer:UnlockForeign
   fun:pthread_mutex_destroy
   ...
   fun:NSS_Shutdown
   ...
   fun:*AtExitManager*
 }
 
 {
+  bug_61585b
+  ThreadSanitizer:UnlockNonLocked
+  fun:pthread_mutex_unlock
+  fun:PR_Unlock
+  fun:nssSession_ExitMonitor
+  fun:find_objects
+  ...
+  fun:nssTrustDomain_FindCertificatesBySubject
+  ...
+}
+
+{
   bug_61753
   ThreadSanitizer:Race
   ...
   fun:*AtExitManager*
 }
 
 ############################
 # Data races in tests
 
 {
@@ skipping 195 matching lines @@
   ThreadSanitizer:Race
   ...
   fun:gethostbyname2_r*
 }
 
 {
   Benign race in nss (PR_EnterMonitor)
   ThreadSanitizer:Race
   fun:PR_EnterMonitor
 }