Add missing slow tags

Author: eregon

spec/tags/command_line/feature_tags.txt

@@ -6,3 +6,5 @@ slow:The --enable and --disable flags can be used with rubyopt
 slow:The --enable and --disable flags can be used with frozen-string-literal
 slow:The --enable and --disable flags prints a warning for unknown features
 slow:The --enable and --disable flags can be used with all
+slow:The --enable and --disable flags can be used with all for enable
+slow:The --enable and --disable flags can be used with all for disable

spec/tags/core/objectspace/define_finalizer_tags.txt

@@ -2,3 +2,6 @@ fails:ObjectSpace.define_finalizer calls finalizer on process termination
 fails:ObjectSpace.define_finalizer calls finalizer at exit even if it is self-referencing
 slow:ObjectSpace.define_finalizer allows multiple finalizers with different 'callables' to be defined
 fails:ObjectSpace.define_finalizer allows multiple finalizers with different 'callables' to be defined
+slow:ObjectSpace.define_finalizer calls a finalizer at exit even if it is self-referencing
+slow:ObjectSpace.define_finalizer calls a finalizer at exit even if it is indirectly self-referencing
+slow:ObjectSpace.define_finalizer calls a finalizer defined in a finalizer running at exit