package/gupnp: switch back to autotools

package/gupnp: switch back to autotools

Switch back to autotools to fix static build with rygel (and so reverts
partially commit 66a3fbb9f6c79e48eaf9e561a4143063e7e9d670
"package/gupnp: bump to version 1.0.4").

Indeed gupnp uses meson's subproject feature for guul which is just
plainly broken on static build with meson, see:
https://github.com/mesonbuild/meson/issues/3934
https://github.com/mesonbuild/meson/issues/3937
https://github.com/mesonbuild/meson/pull/3939

This will fix a build failure with rygel

Fixes:
 - http://autobuild.buildroot.org/results/ebbf96a1be5547e416feb1e96e55986890d0a1de

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>