[meld] appveyor: Limit automatic building to release branches

[Kai Willadsen <kaiw src gnome org>]

commit 3fcffe362c58ca5c5f7cd5f37757ac58de850a6c
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Nov 12 07:58:34 2017 +1000

    appveyor: Limit automatic building to release branches

 appveyor.yml |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/appveyor.yml b/appveyor.yml
index b3902ab..bf5cb5f 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,14 @@
 version: tag-or-branch-set-from-init-script.{build}
 
+# Limit builds to release branches
+branches:
+  only:
+    - master
+    - meld-3-18
+
+# Only build tags automatically
+skip_non_tags: true
+
 init:
   - ps: |
       if ($env:APPVEYOR_REPO_TAG -eq "true") {