neovim: fix build on Darwin
neovim: fix build on Darwin

libluv path passed to -DLIBLUV_LIBRARY broken by change in libluv, eg:
libluv.dylib -> libluv.1.30.0.dylib

Signed-off-by: Sirio Balmelli <50e55ca76dd9b5a7b391c1cd5393aefacbbd09c8@b-ad.ch>

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs