package/upmpdcli: add patch to fix include path of log

The "log.{h,hxx}" header files are included from libupnpp.

As we are using the pkg-config file of libupnpp to get the header
include path, instead of the hardcoded `{prefix}/include/libupnpp`
these files are not found.

Upstream-status: https://github.com/medoc92/upmpdcli/issues/46



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