[master] 7d90528fc travis: Run verbose witness jobs

[Dridi Boukelmoune]

commit 7d90528fc45cf8d3dacf0f10cae79c42fd3ce06a
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Tue Sep 29 16:44:50 2020 +0200

    travis: Run verbose witness jobs

diff --git a/.travis.yml b/.travis.yml
index cf12dcde0..7175105fd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -47,7 +47,7 @@ jobs:
         - ./configure --enable-maintainer-mode
     - <<: *test-linux
       env: WITNESS=1
-      script: make -j8 witness
+      script: make -j8 witness VERBOSE=1
     - <<: *test-linux
       stage: sanitizers
       addons: