package/libupnp18: add upstream patch to fix runtime crash with musl

Applications build with a musl 1.1.20+ toolchain and linked with libupnpp will
crash at runtime with `Illegal instruction` as musl is more strict with
trying to detach an already detached thread resulting in undefined
behaviour.

Upstream status:
https://github.com/mrjimenez/pupnp/issues/102

Backported from:
https://github.com/mrjimenez/pupnp/commit/04b454f693d0c71336252380d08f1d02967e133e



Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>