gripgen: init at 0.8

[Azulinho]

Motivation for this change

grip (gripgen) was missing in nixpkgs,
http://sc0ty.pl/2016/12/grip-indexed-grep/

grip allows me to grep through a 120GB source codebase in less than 10 secs

 >>> du -sm .
121056	.

 >>> time /home/azul/tmp/grip-on-nixpkgs/azulinho-nixpkgs/result/bin/grip 'stuff'  >/dev/null

real	0m9.658s
user	0m8.131s
sys	0m0.778s

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• 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)
• (not-applicable - new pkg) Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-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)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[JohnAZoidberg]

Cool! Works, tried to "grip" through nixpkgs.

[JohnAZoidberg]

Suggested change

	sha256 = "sha256:0bkqarylgzhis6fpj48qbifcd6a26cgnq8784hgnm707rq9kb0rx";
	sha256 = "0bkqarylgzhis6fpj48qbifcd6a26cgnq8784hgnm707rq9kb0rx";

[Azulinho]

Will do in a wee bit

[Azulinho]

done in 125615b

[JohnAZoidberg]

Suggested change

	pname = "gripgen";
	pname = "grip";

gripgen is only the tool to generate the database. (Also change commit and all-packages.nix)

[Azulinho]

Grip is already taken,
Its some gui app, that's why I used gripgen

Ideally, we should have all our pkgs namespaced,

`tools.text.grip

but that's another battle

[aanderse]

#60182

[aanderse]

@Azulinho please collaborate with @tex so there is only one PR to merge.

[Azulinho]

@tex has the thing sorted, so I can close this one