Merge pull request #6175 from ipfs/ci/sharness-output

ci: avoid interleaving output from different sharness tests

.circleci/config.yml

@@ -72,7 +72,7 @@ jobs:
     - *make_out_dirs
     - *restore_gomod
 
-    - run: make -j 10 coverage/sharness_tests.coverprofile test/sharness/test-results/sharness.xml TEST_GENERATE_JUNIT=1 CONTINUE_ON_S_FAILURE=1
+    - run: make -O -j 10 coverage/sharness_tests.coverprofile test/sharness/test-results/sharness.xml TEST_GENERATE_JUNIT=1 CONTINUE_ON_S_FAILURE=1
 
     - run:
         when: always