[RDY] vim-patch: Mark patches as NA.

* https://code.google.com/p/vim/source/detail?r=v7-4-479 modifies removed code in `os_mswin.c` and `os_win32.c`.
* https://code.google.com/p/vim/source/detail?r=v7-4-480 modifies removed code in `os_win32.c`.
* https://code.google.com/p/vim/source/detail?r=v7-4-481 modifies removed code in `os_mswin.c`.
* https://code.google.com/p/vim/source/detail?r=v7-4-482 modifies removed code in `gui_beval.c`.
* https://code.google.com/p/vim/source/detail?r=v7-4-476 modifies Makefiles.
* https://code.google.com/p/vim/source/detail?r=v7-4-475 modifies configure checks wrt X11 features.
* https://code.google.com/p/vim/source/detail?r=v7-4-471 modifies removed code in `os_mswin.c`.
* https://code.google.com/p/vim/source/detail?r=v7-4-469 reorders code to build on MSVC.
* https://code.google.com/p/vim/source/detail?r=v7-4-465 modifies removed code in `os_win32.c`.
* https://code.google.com/p/vim/source/detail?r=v7-4-464 modifies removed code in `gui_w32.c`.
* https://code.google.com/p/vim/source/detail?r=v7-4-461 modifies removed code in `os_mswin.c`.

*Edit:* Before I go on with this, will any of the Windows files from Vim such as `os_win32.c` be added back, or are they completely replaced (by `src/nvim/os`, I guess)? From what I can see, @equalsraf can build Neovim on Windows without any `os_win*.c` files? I'm just a bit confused because `os_unix.c` is still there, but none of the other `os_` files are.