.github: split distcheck into separate check + distcheck steps

- We want log files from check archived
 - We want to verify that checks can run from tarball

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

.github/workflows/build.yml

@@ -59,10 +59,13 @@ jobs:
           /tmp/sbin/finit -h
           /tmp/sbin/initctl -h
       - name: Run Unit Tests
+        run: |
+          make check || (cat test/test-suite.log; false)
+      - name: Check dist tarball
         run: |
           ver=$(/tmp/sbin/initctl -V | awk '/Finit.*/ {print $2;}')
           dir=finit-$ver/_build/sub
-          make -j1 distcheck || (cat $dir/test/test-suite.log; false)
+          make distcheck || (cat $dir/test/test-suite.log; false)
       - name: Upload Test Results
         uses: actions/upload-artifact@v3
         with: