[RFC] vim-patch: Mark 479-482 as NA.

* https://code.google.com/p/vim/source/detail?r=v7-4-479: only modifies removed functionality in `os_mswin.c` and `os_win32.c`.
* https://code.google.com/p/vim/source/detail?r=v7-4-480: only modifies removed functionality in `os_win32.c`.
* https://code.google.com/p/vim/source/detail?r=v7-4-481: only modifies removed removed functionality in `os_mswin.c`.
* https://code.google.com/p/vim/source/detail?r=v7-4-482: only modifies removed removed functionality in `gui_beval.c`.