- fix package lists for build regular-rescue, regular-gnustep,
  regular-wmaker
- drm: fix select nvidia for stage2
- grub: add Tatar (tt_RU) and Mari (mhr_RU) languages
- stage2: change INSTALL2_INIT as try (can be reassigned)
- regular.mk: INSTALL2_INIT='systemd.unit=install2.target' for desktop
  (sisyphus only)
- e2k/generate.mk: use INSTALL2_INIT variable for livecd install