Add gettext to ubuntu-focal job.

Required to build Dyninst

.github/workflows/ubuntu-focal.yml

@@ -436,7 +436,7 @@ jobs:
         max_attempts: 5
         command: |
           sudo apt-get update &&
-          sudo apt-get install -y autoconf bison build-essential clang environment-modules libomp-dev libtool m4 python3-pip texinfo ${{ matrix.compiler }} ${{ matrix.deps }} &&
+          sudo apt-get install -y autoconf bison build-essential clang environment-modules gettext libomp-dev libtool m4 python3-pip texinfo ${{ matrix.compiler }} ${{ matrix.deps }} &&
           if [ "${{ matrix.mpi }}" = "mpich" ]; then sudo apt-get install -y libmpich-dev mpich; fi &&
           if [ "${{ matrix.mpi }}" = "openmpi" ]; then sudo apt-get install -y libopenmpi-dev openmpi-bin libfabric-dev; fi &&
           wget https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v46.0/linux-amd64/trace_processor_shell -P /opt/trace_processor/bin &&