Add correct framebuffer mapping, so Doom works again, remove unneded

code, add cooperative scheduling on syscalls determined by the
reschedule flag, make serial console automatically clear and be a single
render, make process_scancodes push to all processes, add a user-facing
framebuffer to be mapped, automatically swap buffers inside timer
interrupt, update all submodules

build_doomgeneric.sh

@@ -1,6 +1,6 @@
 bash build_libxunil.sh
 cd user/apps/doomgeneric/doomgeneric
 rm -r ./build
-make -j16 -f Makefile.xunil
+make LD=/usr/bin/ld -j16 -f Makefile.xunil
 cp doomgeneric ../../../../assets/doomgeneric
 cd ../../../..