make: link gnutls into libkres

It's needed after the parent merge (sometimes, e.g. on macos).
We always depended on it through libdnssec, so it's no real difference.
11 jobs for link-libkres-gnutls in 4 minutes and 6 seconds
Status Job ID Name Coverage
  Build
failed #74231
amd64 linux docker
build:linux:amd64

00:01:39

canceled #73199
amd64 linux docker
build:linux:amd64

passed #48524
docker linux amd64
build:linux:amd64

00:00:27

canceled #72830
docker linux amd64
build:linux:amd64

passed #73379
amd64 linux docker
build:linux:amd64

00:04:44

 
  Test
canceled #73283
amd64 linux docker
deckard:linux:amd64

passed #48528
docker linux amd64
respdiff:linux:amd64

00:02:26

passed #48525
docker linux amd64
test:linux:amd64

00:00:25

passed #48527
docker linux amd64
test:linux:amd64:valgrind

00:01:02

passed #48526
docker linux amd64
deckard:linux:amd64

00:03:22

canceled #73106
amd64 linux docker
deckard:linux:amd64

 
Name Stage Failure
failed
build:linux:amd64 Build There is an unknown failure, please try again
Running with gitlab-runner 10.1.0 (c1ecf97f)
on gitlab-ci.labs.nic.cz (e35b67ff)
Using Docker executor with image cznic/ubuntu:16.04 ...
Using docker image sha256:d2c6bc290aa78a095a94a399cf35b0e9c4fe70e9e2f41f767bace297dc61d3d9 for predefined container...
WARNING: Can't disconnect possibly zombie container runner-e35b67ff-project-147-concurrent-1-predefined from network bridge -> Error response from daemon: Error saving container to disk: open /var/lib/docker/containers/a8760ce8bf33f926031f186851c264204e50efa7aae739226b8cd774ceae8414/.tmp-config.v2.json267062033: no such file or directory
Pulling docker image cznic/ubuntu:16.04 ...
Using docker image cznic/ubuntu:16.04 ID=sha256:3ab862a7b85ee6bc3a3ee69ec249785a5ee8024e89cc1a9385b6ce756567953a for build container...
Running on runner-e35b67ff-project-147-concurrent-1 via gitlab-ci.labs...
ERROR: Job failed (system failure): Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?