CI: Add a check for building tools for PyPi

Add a simple check that the PyPi packages can be built.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/.azure-pipelines.yml b/.azure-pipelines.yml
index 30025ff..61ada4d 100644
--- a/.azure-pipelines.yml
+++ b/.azure-pipelines.yml
@@ -232,6 +232,16 @@
       # have no matches.
       - script: git grep u-boot,dm- -- '*.dts*' && exit 1 || exit 0
 
+  - job: check_packing_of_python_tools
+    displayName: 'Check we can package the Python tools'
+    pool:
+      vmImage: $(ubuntu_vm)
+    container:
+      image: $(ci_runner_image)
+      options: $(container_option)
+    steps:
+      - script: make pip
+
 - stage: test_py
   jobs:
   - job: test_py