[gimp/wip/Jehan/incremental-win-installer-improvements] Keep the build directory to check the logs!

[Jehan <jehanp src gnome org>]

commit 4ab07a1f6b6c61795f4d6f99c363b1f3d0a49334
Author: Jehan <jehan girinstud io>
Date:   Tue Jun 22 11:39:07 2021 +0200

    Keep the build directory to check the logs!

 .gitlab-ci.yml | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8e9ba15818..d19f5930df 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -302,6 +302,7 @@ gimp-win64-native:
     paths:
     - _install-w64
     - _build-w64/build/windows/installer/lang/
+    - _build-w64
   cache:
     paths:
     - _ccache/