Use 16.04 AppImageLibraries repo

scripts/package

@@ -27,8 +27,8 @@ install_build_deps_appimage() {
 
     apt-get -y --force-yes install software-properties-common
     add-apt-repository -y ppa:beineri/opt-qt-5.12.3-xenial
-    echo 'deb http://download.opensuse.org/repositories/home:/TheAssassin:/AppImageLibraries/xUbuntu_14.04/ /' > /etc/apt/sources.list.d/curl-httponly.list
-    curl -fsSL https://download.opensuse.org/repositories/home:TheAssassin:AppImageLibraries/xUbuntu_14.04/Release.key | apt-key add -
+    echo 'deb http://download.opensuse.org/repositories/home:/TheAssassin:/AppImageLibraries/xUbuntu_16.04/ /' > /etc/apt/sources.list.d/curl-httponly.list
+    curl -fsSL https://download.opensuse.org/repositories/home:TheAssassin:AppImageLibraries/xUbuntu_16.04/Release.key | apt-key add -
     apt-get update -qq
 
     apt-get -y --force-yes install build-essential mesa-common-dev libglu1-mesa-dev qt512base qt512websockets