Limit the branches that build on our public CI.

[ci skip]

.travis.yml

@@ -16,5 +16,11 @@ os:
   - linux
   - osx
 osx_image: xcode7.1
+branches:
+  only:
+    - master
+    - release
+    - dev
+    - /^(.*\\/)?ci-.*$/
 script:
   - ./build.sh --quiet verify

appveyor.yml

@@ -1,5 +1,11 @@
 init:
   - git config --global core.autocrlf true
+branches:
+  only:
+    - master
+    - release
+    - dev
+    - /^(.*\\/)?ci-.*$/
 build_script:
   - build.cmd --quiet verify
 clone_depth: 1