no links to subdirectories in generated html

[ensc]

The generated HTML output in index.html contains only links to the source files of the current directory. Modules are not listed and require manual modification of the url.

E.g. package content looks like

Opening index.html shows only the .rs files but not devices/, http/ or other modules:

grcov (0.9.1) is invoked as

    - grcov
      "${X_CI_PROFILE_DIRECTORY}"
      --binary-path "${CARGO_TARGET_DIR}/debug"
      --llvm
      --branch
      -s "."
      -o "${CARGO_TARGET_DIR}/coverage/"
      --keep-only '*'
      --ignore "${CARGO_HOME}/**"
      --ignore "${CARGO_TARGET_DIR}/**"
      --ignore-not-existing
      --output-types html,cobertura
      --commit-sha "${CI_COMMIT_SHA}"
      ${CI_COMMIT_BRANCH:+--vcs-branch "${CI_COMMIT_BRANCH}"}