Merge branch 'ab/sanitize-leak-ci' into ab/mark-leak-free-tests

* ab/sanitize-leak-ci:
  tests: add a test mode for SANITIZE=leak, run it in CI
  Makefile: add SANITIZE=leak flag to GIT-BUILD-OPTIONS

.github/workflows/main.yml

@@ -232,6 +232,9 @@ jobs:
           - jobname: linux-gcc-default
             cc: gcc
             pool: ubuntu-latest
+          - jobname: linux-leaks
+            cc: gcc
+            pool: ubuntu-latest
     env:
       CC: ${{matrix.vector.cc}}
       jobname: ${{matrix.vector.jobname}}