Add z3 to packaging jobs

z3 is now required by these packaging jobs, because they run tests and
some of the tests now require z3.

Author: thomasspriggs

.github/workflows/release-packages.yaml

@@ -13,7 +13,9 @@ jobs:
         with:
           submodules: recursive
       - name: Fetch dependencies
-        run: sudo apt-get install --no-install-recommends -y g++ gdb flex bison cmake ninja-build maven jq libxml2-utils dpkg-dev ccache
+        run: sudo apt-get install --no-install-recommends -y g++ gdb flex bison cmake ninja-build maven jq libxml2-utils dpkg-dev ccache z3
+      - name: Confirm z3 solver is available and log the version installed
+        run: z3 --version
       - name: Prepare ccache
         uses: actions/cache@v2
         with:
@@ -70,11 +72,13 @@ jobs:
           submodules: recursive
       - name: Fetch dependencies
         run: |
-          sudo apt-get install --no-install-recommends -y g++ gdb flex bison cmake ninja-build maven jq libxml2-utils dpkg-dev ccache
+          sudo apt-get install --no-install-recommends -y g++ gdb flex bison cmake ninja-build maven jq libxml2-utils dpkg-dev ccache z3
           # remove libgcc-s1, which isn't normally available in Ubuntu 18.04
           target=$(dpkg-query -W --showformat='${Version}\n' gcc-8-base | head -n 1)
           # libgcc1 uses an epoch, thus the extra 1:
           sudo apt-get install -y --allow-downgrades --reinstall gcc g++ libgcc-s1- libstdc++6=$target liblsan0=$target libtsan0=$target libcc1-0=$target libgcc1=1:$target
+      - name: Confirm z3 solver is available and log the version installed
+        run: z3 --version
       - name: Prepare ccache
         uses: actions/cache@v2
         with: