Update buildroot & docker (#25)

* Update docker & buildroot

* Fix

* fix versions

buildroot/.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:20180205.0730
+image: buildroot/base:20180318.1724
 
 .defconfig_script: &defconfig_script
     - echo 'Configure Buildroot'
@@ -30,9 +30,21 @@ check-DEVELOPERS:
     script:
         - "! utils/get-developers | grep -v 'No action specified'"
 
+check-flake8:
+    before_script:
+        # Help flake8 to find the Python files without .py extension.
+        - find * -type f -name '*.py' > files.txt
+        - find * -type f -print0 | xargs -0 file | grep 'Python script' | cut -d':' -f1 >> files.txt
+        - sort -u files.txt | tee files.processed
+    script:
+        - python -m flake8 --statistics --count $(cat files.processed)
+    after_script:
+        - wc -l files.processed
+
 check-package:
     script:
-        - find . -type f \( -name '*.mk' -o -name '*.hash' \) -exec ./utils/check-package {} +
+        - find . -type f \( -name '*.mk' -o -name '*.hash' -o -name 'Config.*' \)
+            -exec ./utils/check-package {} +
 
 .defconfig: &defconfig
     # Running the defconfigs for every push is too much, so limit to