Azure/GitLab: Move to latest Docker images

- Based on newer 'bionic' snapshot
- GCC 9.0
- RISCV GRUB binaries

Signed-off-by: Tom Rini <trini@konsulko.com>

.azure-pipelines.yml

 variables:
   windows_vm: vs2017-win2016
   ubuntu_vm: ubuntu-18.04
-  ci_runner_image: trini/u-boot-gitlab-ci-runner:bionic-20200112-21Feb2020
+  ci_runner_image: trini/u-boot-gitlab-ci-runner:bionic-20200311-10Apr2020
   # Add '-u 0' options for Azure pipelines, otherwise we get "permission
   # denied" error when it tries to "useradd -m -u 1001 vsts_azpcontainer",
   # since our $(ci_runner_image) user is not root.

.gitlab-ci.yml

@@ -2,7 +2,7 @@
 
 # Grab our configured image.  The source for this is found at:
 # https://gitlab.denx.de/u-boot/gitlab-ci-runner
-image: trini/u-boot-gitlab-ci-runner:bionic-20200112-21Feb2020
+image: trini/u-boot-gitlab-ci-runner:bionic-20200311-10Apr2020
 
 # We run some tests in different order, to catch some failures quicker.
 stages: