Some demo outputs were zero length because they were recorded with
the "alternate" version of Final Doom included with the id anthology.
So add an exceptions file that lists these, and fix the expected
outputs for these files.
This is the first step towards a fix for #1.
Since chocolate-doom/chocolate-doom#368 was fixed, this demo now plays
back correctly. So add the correct expected output for this demo so
that the test runs correctly.
For some reason that I'm unable to determine, certain demos exit with a
V_DrawPatch error when they are played back using statdump.exe and
the -nodraw parameter. Because of this, the statistics information is
not recorded. I have manually recorded the correct output from these
demos to fix the problem.
