gitlab: 10.3.3 -> 10.3.4

Fixes:
- CVE-2017-0915
- CVE-2018-3710
- CVE-2017-0918
- CVE-2017-0923
- CVE-2017-0925
- CVE-2017-0926
- CVE-2017-0924
- CVE-2017-0914
- CVE-2017-0916
- CVE-2017-0917
- CVE-2017-0927
- CVE-2017-0922

See https://about.gitlab.com/2018/01/16/gitlab-10-dot-3-dot-4-released/
for details.

pkgs/applications/version-management/gitlab/default.nix

···
     };
   };
 
-  version = "10.3.3";
+  version = "10.3.4";
 
   gitlabDeb = fetchurl {
     url = "https://packages.gitlab.com/gitlab/gitlab-ce/packages/debian/jessie/gitlab-ce_${version}-ce.0_amd64.deb/download";
-    sha256 = "0bnafl7mpm3vjhfkqwgf5ff1y1iixfdfvv25zmpl0yjd70fwx2aq";
+    sha256 = "0b6508hcahvhfpxyrqs05kz9a7c1wv658asm6a7ccish6hnwcica";
   };
 
 in
···
     owner = "gitlabhq";
     repo = "gitlabhq";
     rev = "v${version}";
-    sha256 = "1fhjijs8rvxrgx43fc7vp6f3vwshwq74gjwk41fi2yam8bri8p6k";
+    sha256 = "0cvp4wwkc04qffsq738867j31igwzj7zlmahdl24yddbmpa5x8r1";
   };
 
   buildInputs = [