Restored docker usage for linux clang

lgeretti · lgeretti · commit 895b525a8536 · 2018-09-08T15:17:37.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -23,7 +23,7 @@ matrix:
     - name: Linux clang
       os: linux
       addons:
-      env: COMPILER=clang++-5.0
+      env: DOCKER=ubuntu:latest COMPILER=clang++-5.0
       
     - name: Linux gcc + Coverage
       os: linux
