[circleci] Run test-license.py

Run it first because it is very fast (~1 second)

.circleci/config.yml

@@ -12,6 +12,7 @@ jobs:
       - run:
           name: Test
           command: |
+            ./tests/test-license.py
             cc -v; CFLAGS="-O0 -Werror" make all && make clean
             make c99build         ; make clean
             make c11build         ; make clean