snapclient: find the alsa plugin via ALSA_PLUGIN_DIR not an rpath and addon (3)

An rpath on the snapclient binary does not locate ALSA plugins - alsa-lib
dlopens them from ALSA_PLUGIN_DIR, and the pulse plugin's libpulse
dependency resolves from the system /usr/lib. Drop the patchelf rpath and
point ALSA_PLUGIN_DIR at lib.private, where the plugins are actually
copied (it previously pointed at a nonexistent lib/).

Author: Rudi Heitbaum

packages/addons/service/snapclient/package.mk

@@ -3,7 +3,7 @@
 
 PKG_NAME="snapclient"
 PKG_VERSION="0.35.0"
-PKG_REV="2"
+PKG_REV="3"
 PKG_ARCH="any"
 PKG_LICENSE="GPL-3.0-or-later"
 PKG_DEPENDS_TARGET="toolchain alsa-plugins snapcast"
@@ -22,7 +22,6 @@ addon() {
 
   cp $(get_install_dir snapcast)/usr/bin/snapclient \
      ${ADDON_BUILD}/${PKG_ADDON_ID}/bin
-  patchelf --add-rpath '${ORIGIN}/../lib.private' ${ADDON_BUILD}/${PKG_ADDON_ID}/bin/snapclient
 
   cp $(get_install_dir alsa-plugins)/usr/lib/alsa/*.so \
      ${ADDON_BUILD}/${PKG_ADDON_ID}/lib.private

packages/addons/service/snapclient/source/system.d/service.snapclient.service

@@ -4,7 +4,7 @@ After=kodi.service network-online.target sound.target
 Requires=kodi.service network-online.target sound.target
 
 [Service]
-Environment=ALSA_PLUGIN_DIR=/storage/.kodi/addons/service.snapclient/lib
+Environment=ALSA_PLUGIN_DIR=/storage/.kodi/addons/service.snapclient/lib.private
 ExecStart=/bin/sh /storage/.kodi/addons/service.snapclient/bin/snapclient.start
 Restart=always