gitlab-ci: Update Docker image to xenial-20190720-24Jul2019 tag

- Add in lzma-alone for current binman tests
- Update to Ubuntu's xenial-20190720 tag (latest).

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b919eaf..95fc689 100644
--- a/.gitlab-ci.yml
+++ b/.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:xenial-20190222-24April2019
+image: trini/u-boot-gitlab-ci-runner:xenial-20190720-24Jul2019
 
 # We run some tests in different order, to catch some failures quicker.
 stages: