[librsvg-oci-images/alatiera/cleanups] Rebuild rust images only if they change

[Jordan Petridis <jpetridis src gnome org>]

commit ff9fd8f7c886cfc8214512954664aa42dab89148
Author: Jordan Petridis <jpetridis gnome org>
Date:   Sun Dec 2 21:30:47 2018 +0200

    Rebuild rust images only if they change

 .gitlab-ci.yml | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 877143e..3c79b77 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -42,6 +42,9 @@ stages:
         - export DIR=rustc/
         - sed -e "s|@RUSTC_VERSION@|$RUSTC_VERSION|" rustc/rustc_template > rustc/rustc.yml
     <<: *base_build
+    only:
+        changes:
+            - 'rustc/*'
 
 fedora latest:
     variables: