meson: Override dependencies to improve usage as a subproject With this change, harfbuzz can be consumed as a subproject without making any changes to the build files of a project. All you need to do is provide a wrap file with a `[provide]` section: https://mesonbuild.com/Wrap-dependency-system-manual.html#provide-section This is also necessary because otherwise projects need to hard-code the subproject name, which might be `harfbuzz` when using `wrap-git` or `harfbuzz-6.0.0` when using `wrap-file` (to build from a release tarball). This can cause conflicts between different subprojects that consume harfbuzz differently. Other projects like glib, cairo, pango, etc already do this.