packaging: Add OpenSUSE Leap 15.3.

Change-Id: I5cbc06d5f7b245bf49578914819a8154c9d2cd6e

docker/Dockerfile_opensuse-leap_15.3

+FROM opensuse/leap:15.3
+
+RUN zypper --non-interactive install -y \
+        dnf \
+        dnf-command\(builddep\) \
+        rpmdevtools \
+        Mesa-dri-devel Mesa-dri \
+        git \
+        gcc8 \
+        gcc8-c++ \
+        rpm-build \
+        tar \
+        make \
+        autoconf \
+        automake \
+        cmake \
+        nasm \
+        speexdsp-devel \
+        libpulse-devel \
+        libcanberra-devel \
+        libcurl-devel \
+        libtool \
+        pcre-devel \
+        yaml-cpp-devel \
+        libdbus-c++-devel \
+        libXext-devel \
+        libXfixes-devel \
+        yasm \
+        speex-devel \
+        libgsm-devel \
+        chrpath \
+        check \
+        astyle \
+        gettext-devel \
+        gcc-c++ \
+        which \
+        alsa-lib-devel \
+        systemd-devel \
+        libuuid-devel \
+        uuid-devel \
+        gnutls-devel \
+        libopus-devel \
+        patch \
+        jsoncpp-devel \
+        webkit2gtk3-devel \
+        libcryptopp-devel \
+        libva-devel \
+        libvdpau-devel \
+        msgpack-devel \
+        clutter-devel \
+        openssl-devel \
+        clutter-gtk-devel \
+        libnma-devel \
+        libcryptopp-devel \
+        libdbus-c++-devel \
+        libexpat-devel \
+        gnome-icon-theme-symbolic \
+        libgsm-devel \
+        gtk3-devel \
+        libappindicator-devel \
+        sqlite-devel \
+        ffmpeg-4-libavutil-devel \
+        gtk3-devel\
+        qrencode-devel \
+        python3-python-dateutil \
+        libsndfile-devel \
+        libdrm \
+        gperf \
+        bison \
+        flex \
+        nodejs12 \
+        mozilla-nss-devel \
+        python-xml \
+        libxcb* \
+        libxkb* \
+        libX11-devel \
+        libXrender-devel \
+        libfreetype6 \
+        xcb-util-image-devel \
+        xcb-util-keysyms-devel \
+        xcb-util-renderutil-devel \
+        xcb-util-wm-devel \
+        xorg-x11-devel \
+        xz \
+        xkeyboard-config \
+        libnotify \
+        libQt5Sql-devel \
+        libQt5Gui-devel \
+        libqt5-qtbase-devel \
+        libqt5-qttools \
+        argon2-devel \
+        wget
+
+RUN update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 50
+RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 50
+
+ADD scripts/build-package-rpm.sh  /opt/build-package-rpm.sh
+
+CMD /opt/build-package-rpm.sh

scripts/make-packaging-target.py

@@ -205,6 +205,11 @@ def run_generate_all(parsed_args):
             "output_file": ".packages-built",
             "options": RPM_BASED_SYSTEMS_DOCKER_RUN_OPTIONS
         },
+        {
+            "distribution": "opensuse-leap_15.3",
+            "output_file": ".packages-built",
+            "options": RPM_BASED_SYSTEMS_DOCKER_RUN_OPTIONS
+        },
         {
             "distribution": "opensuse-tumbleweed",
             "output_file": ".packages-built",