Add tags for new failing specs

Author: eregon

spec/tags/core/module/autoload_tags.txt

@@ -2,3 +2,4 @@ fails:Module#autoload (concurrently) blocks others threads while doing an autolo
 fails:Module#autoload removes the constant from Module#constants if the loaded file does not define it
 fails:Module#autoload after autoloading searches for the constant like the original lookup looks up in parent scope after failed autoload
 fails:Module#autoload after autoloading searches for the constant like the original lookup warns once in verbose mode if the constant was defined in a parent scope
+fails:Module#autoload during the autoload after the constant is assigned returns nil in autoload thread and returns the path in other threads for Module#autoload?

spec/tags/core/process/status/termsig_tags.txt

@@ -2,3 +2,4 @@ slow:Process::Status#termsig for a child that was sent a signal returns the sign
 slow:Process::Status#termsig for a child that exited normally returns true
 slow:Process::Status#termsig for a child that raised SignalException returns the signal
 slow:Process::Status#termsig for a child that raised SignalException returns the signal
+slow:Process::Status#termsig for a child that exited normally returns nil

spec/tags/language/hash_tags.txt

@@ -6,3 +6,4 @@ fails(https://github.com/ruby/prism/issues/2115):Hash literal expands an '**{}'
 fails(https://github.com/ruby/prism/issues/2115):Hash literal merges multiple nested '**obj' in Hash literals
 fails(https://github.com/ruby/prism/issues/2129):Hash literal raises an EncodingError at parse time when Symbol key with invalid bytes
 fails(https://github.com/ruby/prism/issues/2129):Hash literal raises an EncodingError at parse time when Symbol key with invalid bytes and 'key: value' syntax used
+fails:The ** operator makes a copy when calling a method taking a positional Hash