packaging: migrate packaging scripts in client-qt

This patch moves already existing packaging scripts from jami-project
into client-qt.
Introduced changes are:
+ WITH_SUBMODULE must search in system lib too because for
packaging client-qt (for rpm) will be built separately, and will
depend on jami-daemon.
+ Fix appdata.xml (replace old wiki with docs.jami.net)
+ path changes (because we build in client-qt not jami-project).

GitLab: #853
Change-Id: I1313830d85c8094fcbcc52e22033a2add7b1e89f

extras/packaging/gnu-linux/scripts/prebuild-package-debian.sh

+#!/usr/bin/env bash
+#
+# Copyright (C) 2021 Savoir-faire Linux Inc.
+#
+# Author: Amin Bandali <amin.bandali@savoirfairelinux.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# This script is used in the packaging containers to build packages on
+# debian-based distros.
+
+set -e
+
+DPKG_BUILD_OPTIONS=""
+# Set the host architecture as armhf and add some specific architecture
+# options to the package builder.
+if grep -q "raspbian_10_armhf" <<< "${DISTRIBUTION}"; then
+    echo "Adding armhf as the host architecture."
+    export HOST_ARCH=arm-linux-gnueabihf
+    DPKG_BUILD_OPTIONS="${DPKG_BUILD_OPTIONS} -a armhf"
+fi
+
+install_deps()
+{
+    apt-get update
+    mk-build-deps \
+        --remove --install \
+        --tool "apt-get -y --no-install-recommends -o Acquire::Retries=10" \
+        "debian/control"
+}
+
+install_dummy()
+{
+    cat <<EOF > dummy-libqt-jami.equivs
+Package: libqt-jami
+Version: 1.0
+Maintainer: The Jami project <jami@gnu.org>
+Architecture: all
+Description: Dummy libqt-jami package
+EOF
+    equivs-build dummy-libqt-jami.equivs
+    dpkg -i libqt-jami_1.0_all.deb
+}
+
+remove_dummy()
+{
+    dpkg -r libqt-jami
+}
+
+case "$1" in
+    qt-deps)
+        (
+            cd /tmp/builddeps
+            install_deps
+            dpkg -r libqt-jami-build-deps
+        )
+        rm -rf /tmp/builddeps
+        exit 0
+        ;;
+    jami-deps)
+        (
+            cd /tmp/builddeps
+            install_dummy
+            install_deps
+            dpkg -r jami-build-deps
+            remove_dummy
+        )
+        rm -rf /tmp/builddeps
+        exit 0
+        ;;
+    *)
+        printf "Usage: %s {qt-deps|jami-deps}\n" "$0"
+        exit 1
+        ;;
+esac

extras/packaging/gnu-linux/tarballs.manifest

+/home/amarok/Projects/jami/daemon/contrib/tarballs/asio-asio-1-22-1.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/ffmpeg-n5.0.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/ffnvcodec-n11.1.5.1.tar.xz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/fmt-9.1.0.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/gmp-6.2.1.tar.bz2
+/home/amarok/Projects/jami/daemon/contrib/tarballs/http-parser-2.9.4.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/libarchive-3.6.0.tar.xz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/libgit2-v1.1.0.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/libnatpmp-20150609.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/opendht-af7d88b057fa4c84ab9096c6a1932bd5d34634ef.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/pjproject-513a3f14c44b2c2652f9219ec20dea64b236b713.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/restinio-bbaa034dbcc7555ce67df0f8a1475591a7441733.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/secp256k1-0b7024185045a49a1a6a4c5615bf31c94f63d9c4.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/pupnp-release-1.14.13.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/libvpx-v1.12.0.tar.gz
+/home/amarok/Projects/jami/daemon/contrib/tarballs/webrtc-audio-processing-v0.3.1.tar.gz