testing/upmpdcli: disable on armhf

build fails with:
/usr/lib/gcc/armv6-alpine-linux-musleabihf/6.4.0/../../../libupnpp.so:
undefined reference to
`std::__set_once_functor_lock_ptr(std::unique_lock<std::mutex>*)'
/usr/lib/gcc/armv6-alpine-linux-musleabihf/6.4.0/../../../libupnpp.so:
undefined reference to `std::__once_functor'
/usr/lib/gcc/armv6-alpine-linux-musleabihf/6.4.0/../../../libupnpp.so:
undefined reference to `std::__get_once_mutex()'

testing/upmpdcli/APKBUILD

@@ -5,7 +5,7 @@ pkgver=1.2.15
 pkgrel=2
 pkgdesc="upmpdcli is a UPnP Media Renderer front-end for MPD, the Music Player Daemon"
 url="http://www.lesbonscomptes.com/upmpdcli"
-arch="all"
+arch="all !armhf"
 license="GPL2"
 options="!check"
 depends=""