[gtk/ci-jobs] ci: Disable ccache

[Emmanuele Bassi <ebassi src gnome org>]

commit b6572955d33091a9ab978e95364f0e54fb18906a
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Jan 29 11:45:33 2020 +0100

    ci: Disable ccache

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 824a6ad4ba..c6fb71b9bf 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,6 +17,7 @@ variables:
   COMMON_MESON_FLAGS: "--fatal-meson-warnings --werror"
   MESON_TEST_TIMEOUT_MULTIPLIER: 2
   G_MESSAGES_DEBUG: all
+  CCACHE_DISABLE: true
 
 fedora-x86_64:
   image: registry.gitlab.gnome.org/gnome/gtk/fedora:v11