heptapod-ci: fix test paths in the listing file

Now what we run the test from the root, we need to list test name from the root.

Differential Revision: https://phab.mercurial-scm.org/D8275

contrib/heptapod-ci.yml

@@ -6,7 +6,7 b' before_script:'
     - hg clone . /tmp/mercurial-ci/ --noupdate
     - hg -R /tmp/mercurial-ci/ update `hg log --rev '.' --template '{node}'`
     - cd /tmp/mercurial-ci/
-    - (cd tests; ls -1 test-check-*.*) > /tmp/check-tests.txt
+    - ls -1 tests/test-check-*.* > /tmp/check-tests.txt
 
 variables:
     PYTHON: python