Unreviewed, rolling out r237479 and r237484.
https://bugs.webkit.org/show_bug.cgi?id=190978
broke JSC on iOS (Requested by tadeuzagallo on #webkit).
Reverted changesets:
"New bytecode format for JSC"
https://bugs.webkit.org/show_bug.cgi?id=187373
https://trac.webkit.org/changeset/237479
"Gardening: Build fix after r237479."
https://bugs.webkit.org/show_bug.cgi?id=187373
https://trac.webkit.org/changeset/237484
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@237486
268f45cc-cd09-0410-ab3c-
d52691b4dbfc