Change "include" match rule from "^include" to "include " since there might
be "skip-if" or other <failure-type> conditions before the "include". The
single space after is added so that tests like "include.html" won't be
excluded.
DONTBUILD because this patch modifies a script checking for the validity of
reftests, which is NPOTB.
MozReview-Commit-ID: 3tFFIo8RKFp