Enables the use of guix as a package manager for neovim, compatible with
the outputs of `vim-build-system`.
* gnu/packages/vim.scm (neovim)[arguments]: Added another phase to
install the system init file to the correct place.
* gnu/packages/aux-files/guix-nvim.vim: New file.
* Makefile.am (AUX_FILES): Register file.
Change-Id: I375e3e0d051da27d065dff5456cb298a01bc90b1
Signed-off-by: Efraim Flashner <efraim@flashner.co.il>
