fix: remove SDL/Mesa/DRI from initramfs — DRI segfault unrecoverable
sigsetjmp can't reliably recover from SIGSEGV during dlopen — process
state is corrupted. The Mesa iris_dri.so driver crashes on ThinkPad 11e
and no in-process recovery works. Removed all SDL/Mesa/DRI libs.
DRM dumb buffers work reliably. SDL3 GPU acceleration needs a
multi-process architecture (init spawns ac-native as child) so
DRI crashes are recoverable via process restart.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>