package/madplay: fix static build

Add a patch to use pkg-config to find id3tag dependency (-lz)

Fixes:
 - http://autobuild.buildroot.org/results/5e4882ddacf205a92a3ff1e79649cf16e4b6c0ae



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Arnout: add comment to AUTORECONF to refer to the patch]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>