Interop: Disable two-pass code when the encode type is constant quality. Update job marshalling padding to account for the addition of done_error.

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6124 b64f7644-9d1e-0410-96f1-a4d463321fa5
Fix HEVC muxing in Matroska.

Some patches haven't been
backported to libav v10_beta2 yet.


git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@6125 b64f7644-9d1e-0410-96f1-a4d463321fa5