[gtk: 1/2] gitlab-ci: cache meson subprojects

[Emmanuele Bassi <ebassi src gnome org>]

commit 1395f7867932ddffd9478c73edfe7b417c2d60a9
Author: Christoph Reiter <creiter src gnome org>
Date:   Thu Feb 15 13:37:02 2018 +0100

    gitlab-ci: cache meson subprojects
    
    This saves another 30sec here and reducing clone operations on the
    gnome gitlab instance is probably a good idea as well.

 .gitlab-ci.yml | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4bc0cb07fe..0d559ef3cb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -11,6 +11,11 @@ before_script:
 cache:
   paths:
     - _ccache/
+    - subprojects/gdk-pixbuf/
+    - subprojects/glib/
+    - subprojects/graphene/
+    - subprojects/libepoxy/
+    - subprojects/pango/
 
 build:
   stage: build