* gc.c (gc_profile_dump_major_reason): fix this function because major_reason
  can be OR of multiple reasons.
* gc.c (gc_profile_dump_on): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44278 b2dd03c8-39d4-4d8f-98ff-823fe69b080e