Update a TSan suppression for the misterious UserScriptMaster race

tools/valgrind/tsan/suppressions.txt

 ############################
 # Real races in Chromium
 {
   bug_23433
   ThreadSanitizer:Race
   fun:*logging*SetMinLogLevel*
 }
 
 {
   bug_24419
@@ skipping 71 matching lines @@
   ThreadSanitizer:Race
   ...
   fun:HistoryURLProvider::ExecuteWithDB*
 }
 
 {
   bug_67957
   ThreadSanitizer:Race
   fun:Replace_memcpy
   fun:memcpy
-  fun:Serialize*
-  fun:UserScriptMaster::ScriptReloader::RunScan*
+  fun:Serialize
+  fun:UserScriptMaster::ScriptReloader::RunLoad
 }
 
 {
   bug_72169a
   ThreadSanitizer:Race
   fun:base::Thread::ThreadMain*
 }
 
 {
   bug_72169b
@@ skipping 443 matching lines @@
   tsanbug_62a
   ThreadSanitizer:Race
   fun:__memset_sse2
 }
 
 {
   tsanbug_62b
   ThreadSanitizer:Race
   fun:__GI_memcpy
 }