CI: build on windows without -j (#815)

Author: jopohl

data/azure-pipelines.yml

@@ -154,7 +154,7 @@ jobs:
       destinationFolder: src\urh\dev\native\lib\shared
       #cleanDestinationFolder: true
 
-  - script: python src/urh/cythonext/build.py
+  - script: python setup.py build_ext --inplace
     displayName: "Build extensions"
 
   - script: |