load.c: use fstring instead of OBJ_FREEZE
These strings already exist (or will exist soon) in the fstring table, so avoid the duplicate, sooner.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62030 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
load.c: use fstring instead of OBJ_FREEZE
These strings already exist (or will exist soon) in the fstring
table, so avoid the duplicate, sooner.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62030 b2dd03c8-39d4-4d8f-98ff-823fe69b080e