Revert "Revert CI deduplication on Wercker / Azure for debugging"

This reverts commit 1ebe9a2f82.

because it did not help.

appveyor.yml

@@ -3,6 +3,9 @@ version: '{build}'
 shallow_clone: true
 platform:
   - x64
+branches:
+  except:
+    - trunk # mirrored master runs CI
 environment:
   ruby_version: "24-%Platform%"
   zlib_version: "1.2.11"

azure-pipelines.yml

@@ -1,4 +1,6 @@
 pr: none # comment out this line if you need to test this file on PR
+trigger:
+  - master
 jobs:
 - job: Linux
   pool: