neovim wrapper: build with nodejs support

[kalbasit]

Motivation for this change

I use NeoVim to develop nodejs projects but my editor does not work well because it's missing the NodeJS neovim provider.

I have tested this by running nix-shell -I nixpkgs=. --pure -p 'with import <nixpkgs> {}; neovim.override { withNodeJs=true; }' --run nvim

When I run :checkhealth, I see it reporting nodejs as functional.

## Node.js provider (optional)
  - INFO: Node.js: v8.12.0
  - INFO: Neovim node.js host: /nix/store/fhmp7164mf7pmvin72z3qxiwv6p8ps9p-node-neovim-4.2.1/bin/neovim-node-host
  - OK: Latest "neovim" npm/yarn package is installed: 4.2.1

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Fits CONTRIBUTING.md.

---

[kalbasit]

@GrahamcOfBorg build neovim

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: neovim

Partial log (click to expand)

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: which@^1.2.14 (node_modules/which):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: request to https://registry.npmjs.org/which failed: cache mode is 'only-if-cached' but no cached response available.

up to date in 0.51s
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/fhmp7164mf7pmvin72z3qxiwv6p8ps9p-node-neovim-4.2.1
patching script interpreter paths in /nix/store/fhmp7164mf7pmvin72z3qxiwv6p8ps9p-node-neovim-4.2.1
checking for references to /build in /nix/store/fhmp7164mf7pmvin72z3qxiwv6p8ps9p-node-neovim-4.2.1...
building '/nix/store/wbj5845nr8klcmn9nkpnvhgvn7bq29hx-neovim-0.3.1.drv'...
/nix/store/8p7plam6zmywj9aqvkb3fp75m6f390d0-neovim-0.3.1

[GrahamcOfBorg]

Failure on aarch64-linux (full log)

Attempted: neovim

Partial log (click to expand)

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: which@^1.2.14 (node_modules/which):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: request to https://registry.npmjs.org/which failed: cache mode is 'only-if-cached' but no cached response available.

up to date in 0.743s
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/8gyn7p130b0jxrcry3wzcb3s2i7wwfzy-node-neovim-4.2.1
patching script interpreter paths in /nix/store/8gyn7p130b0jxrcry3wzcb3s2i7wwfzy-node-neovim-4.2.1
checking for references to /build in /nix/store/8gyn7p130b0jxrcry3wzcb3s2i7wwfzy-node-neovim-4.2.1...
cannot build derivation '/nix/store/g64vvl12xiji2ph5qdqvadsqnancf5vy-neovim-0.3.1.drv': 1 dependencies couldn't be built
error: build of '/nix/store/g64vvl12xiji2ph5qdqvadsqnancf5vy-neovim-0.3.1.drv' failed

[kalbasit]

@GrahamcOfBorg build neovim

[GrahamcOfBorg]

Failure on aarch64-linux (full log)

Attempted: neovim

Partial log (click to expand)

stack traceback:
        [C]: in function 'match'
        /build/source/src/nvim/generators/gen_declarations.lua:255: in main chunk
        [C]: at 0x00405660
make[2]: *** [src/nvim/CMakeFiles/nvim.dir/build.make:253: src/nvim/auto/eval/encode.c.generated.h] Error 1
make[1]: *** [CMakeFiles/Makefile2:2870: src/nvim/CMakeFiles/nvim.dir/all] Error 2
make: *** [Makefile:152: all] Error 2
builder for '/nix/store/03aa9ky5bkr7lhiy22yh4di18gjn8wwy-neovim-unwrapped-0.3.1.drv' failed with exit code 2
cannot build derivation '/nix/store/xlwz6czhyymxks1vyh4il8lsdzsjb1p3-neovim-0.3.1.drv': 1 dependencies couldn't be built
error: build of '/nix/store/xlwz6czhyymxks1vyh4il8lsdzsjb1p3-neovim-0.3.1.drv' failed

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: neovim

Partial log (click to expand)

copying path '/nix/store/xwshfcsm0g6jg92qv9n86hifcs28wb5g-python3-3.6.6-env' from 'https://cache.nixos.org'...
copying path '/nix/store/zm6hic6ig0cfmf4bh7780q8l91vn269a-python2.7-neovim-0.2.6' from 'https://cache.nixos.org'...
copying path '/nix/store/pgah0vvx4ij2hxxm4fg7rphd1bxdvic8-ruby2.5.3-neovim-0.7.0' from 'https://cache.nixos.org'...
copying path '/nix/store/bwb014vlw6ziwlq98pf7qhlr8xhvwa77-python-2.7.15-env' from 'https://cache.nixos.org'...
copying path '/nix/store/hfrfxsqq2j511kkl70ypd3frxjxjjdi6-neovim-ruby-env' from 'https://cache.nixos.org'...
copying path '/nix/store/fn158ydnapyhsrikbdq3b5p8crq9ypp8-unibilium-2.0.0' from 'https://cache.nixos.org'...
copying path '/nix/store/ks820gxg0xjliihfvjn8rfbl4nzprm56-xsel-unstable-2016-09-02' from 'https://cache.nixos.org'...
copying path '/nix/store/dc9p20jkqq2px0fbh9chha2rnwmvwhsr-neovim-unwrapped-0.3.1' from 'https://cache.nixos.org'...
building '/nix/store/6wcl82vwfb970yrc6z2j7pcfirdvrcg9-neovim-0.3.1.drv'...
/nix/store/8mazyvxk9r3cla2jpm0pryixhr8z4y8f-neovim-0.3.1

[teto]

not familiar with nodeJs but looks fine.

[kalbasit]

I rebased this PR over the latest master, @Mic92 can I get a review on this one?