[gnome-applets/wip/muktupavels/werror] ci: build with -Werror

[Alberts Muktupāvels <muktupavels src gnome org>]

commit e8cd4b97ac040172025131b9fbc14ecda038c7ea
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Apr 4 23:51:07 2020 +0300

    ci: build with -Werror

 .gitlab-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 90862503c..446df1b66 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -59,7 +59,7 @@ ubuntu:
     - *install-ubuntu-dependencies
     - *build-gnome-panel
   script:
-    - ./autogen.sh --disable-Werror
+    - ./autogen.sh
     - make
     - make distcheck