tools: fix r1780 cycle prerequisites and add SDL GLX-pbuffer shim

- cycle-r1780.sh: load vfio modules one per modprobe (the multi-module
  form was silently treating the extra names as parameters and never
  loading mdev); auto-detect the vgpu mdev type and prefer the 2 GiB
  type used by the campaign.
- sdl_cap.c: gate capture-file creation to processes that can actually
  read GL pixels (a child was truncating the capture), and log the
  capture pid/pointers.
- gz_pbuf.c: LD_PRELOAD shim that gives an SDL2 GL client a GLX pbuffer
  context on the guest's NVIDIA X server (the proven gl_frames path),
  with SDL_GL_GetDrawableSize/SwapWindow interception.

0 files changed, 0 insertions, 0 deletions