Gardening: Mark svg-fonts-without-missing-glyph.xhtml as failing on XP

NOTRY=true
TBR=tkent@chromium.org
BUG=411175

Review URL: https://codereview.chromium.org/542053002

git-svn-id: svn://svn.chromium.org/blink/trunk@181445 bbb929c8-8fbe-4397-9dbb-9b2b20218538