merge revision(s) 64515:
remove `const` warning. * compile.c (iseq_ibf_load): remove `const` to pass iseq as no `const` parameter.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@65274 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 64515:
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@65274 b2dd03c8-39d4-4d8f-98ff-823fe69b080e