Workaround for pkg.generate() escaping spaces in pc variables that shouldn't be escaped. Perhaps going back to configure_file() would be a better option though. Really needs a fix in Meson. Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/issues/884 Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1150>