pass: add find and grep as dependencies

When pass is called from passff it does not have grep and find in its
path.

PATH="" /home/beardhatcode/.nix-profile/bin/pass grep lol                                             ~
/nix/store/HASH-password-store-1.7.3/bin/.pass-wrapped: line 399: find: command not found

$ PATH="/nix/store/HASH-findutils-4.7.0/bin" /home/beardhatcode/.nix-profile/bin/pass grep lol
/nix/store/HASH-password-store-1.7.3/bin/.pass-wrapped: line 403: grep: command not found
/nix/store/HASH-password-store-1.7.3/bin/.pass-wrapped: line 403: grep: command not found

(cherry picked from commit 29e1b41)

pkgs/tools/security/pass/default.nix

@@ -1,6 +1,6 @@
 { stdenv, lib, pkgs, fetchurl, buildEnv
-, coreutils, gnused, getopt, git, tree, gnupg, openssl, which, procps
-, qrencode , makeWrapper, pass, symlinkJoin
+, coreutils, findutils, gnugrep, gnused, getopt, git, tree, gnupg, openssl
+, which, procps , qrencode , makeWrapper, pass, symlinkJoin
 
 , xclip ? null, xdotool ? null, dmenu ? null
 , x11Support ? !stdenv.isDarwin
@@ -78,8 +78,10 @@ stdenv.mkDerivation rec {
 
   wrapperPath = with stdenv.lib; makeBinPath ([
     coreutils
+    findutils
     getopt
     git
+    gnugrep
     gnupg
     gnused
     tree