libdca.recipe: Fixup symlinks to have a relative path
libdca.recipe: Fixup symlinks to have a relative path

These are written out with an absolute path, which breaks relocation.

Part-of: <https://gitlab.freedesktop.org/gstreamer/cerbero/-/merge_requests/613>

GStreamer/cerbero,GStreamer/cerbero,GStreamer/cerbero,nirbheek/cerbero,nirbheek/cerbero,nirbheek/cerbero,GStreamer/cerbero,GStreamer/cerbero,nirbheek/cerbero