tst_LargeFile currently seems to pass in a stable way in CI
It does have an issue on 64-bit Linux (see QTBUG-21175), so
that test function is still disabled (QEXPECT_FAIL'ed) on that platform.
Change-Id: I818046f84f2db5eb2155ae1f51f69581029bfaee
Reviewed-by: Jason McDonald <jason.mcdonald@nokia.com>
Reviewed-by: Shane Kearns <shane.kearns@accenture.com>