message: relax timeout further
diff: - ninja -j${NUM_CORES} -l${CI_LOAD_LIMIT} install
  - |
  (( $(ctest -N | tail -1 | sed 's/Total Tests: //') != 0 )) || exit 1
  - - ctest -V --timeout 3000
  + - ctest -V --timeout 6000
  - ninja test_install
  - pushd test/test_install
  - ninja install
  - cd ${CI_JOB_NAME/test/build}
  - |
  (( $(ctest -N | tail -1 | sed 's/Total Tests: //') != 0 )) || exit 1
  - - ctest -V --timeout 3000
  + - ctest -V --timeout 6000
  - ninja test_install
  - pushd test/test_install
  - ninja install
  