gitlab-ci: use our updated docker base image

It has python3 and nose for python3! :-)

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

.gitlab-ci.yml

@@ -4,7 +4,7 @@
 # It needs to be regenerated every time a defconfig is added, using
 # "make .gitlab-ci.yml".
 
-image: buildroot/base:20180318.1724
+image: buildroot/base:20191027.2027
 
 .check_base:
     except:

.gitlab-ci.yml.in

@@ -4,7 +4,7 @@
 # It needs to be regenerated every time a defconfig is added, using
 # "make .gitlab-ci.yml".
 
-image: buildroot/base:20180318.1724
+image: buildroot/base:20191027.2027
 
 .check_base:
     except: