Bug 1134120 - Enable parse-a-sizes-attribute.html test and update meta data; r=jdm

MozReview-Commit-ID: Dv8zpEC4itL
2016-04-01 19:07:59 +08:00 · 2016-04-01 19:07:59 +08:00 · 421091b927
--- a/testing/web-platform/meta/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute.html.ini
+++ b/testing/web-platform/meta/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute.html.ini