Use opt_{aref,aset} over opt_{aref,aset}_with
* compile.c (iseq_compile_each0): Use `opt_aref`/`opt_aset` over
`opt_aref_with`/`opt_aset_with` when frozen_string_literal: true,
not to resurrect the index string on non-Hash receiver.
[Fix GH-1957]
From: chopraanmol1 <chopraanmol1@gmail.com>
merge revision(s) 64745: [Backport #15118]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@65002 b2dd03c8-39d4-4d8f-98ff-823fe69b080e