main/gnutls: security upgrade to 3.6.15

- CVE-2020-24659

(cherry picked from commit 1c38dfee)
7 jobs for !12090 with 3.11-gnutls in 22 minutes and 4 seconds (queued for 3 seconds)
detached
Status Job ID Name Coverage
  Lint
passed #199879
x86_64 docker-alpine
lint

00:00:23

 
  Build
passed #199884
aarch64 ci-build docker-alpine
build-aarch64

00:03:32

passed #199885
armv7 ci-build docker-alpine
build-armv7

00:05:14

passed #199883
ppc64le ci-build docker-alpine
build-ppc64le

00:09:56

passed #199882
s390x ci-build docker-alpine
build-s390x

00:02:09

passed #199881
x86 ci-build docker-alpine
build-x86

00:02:58

passed #199880
x86_64 ci-build docker-alpine
build-x86_64

00:02:42