Move test expectations from 'ios-11' to 'ios' directory
Reverted r222278 for reason: This needs more work before it can be landed. Committed r222281: <http://trac.webkit.org/changeset/222281>
Committed http://trac.webkit.org/projects/webkit/changeset/222390
<rdar://problem/34694548>
For the record, regarding the 4 MathML tests that were failing after this change: - I rebased the PNG expectations for 3 of them in https://trac.webkit.org/changeset/229403/webkit ; rendering looks good to me (and even better with respect to old expectations). - The other one is a reftest, I opened bug 183441. The diff is minimal, I don't think it's a serious issue.