Re-add libselinux for CI

If we don't move runcon specific tests, we still need it...
Also reduces size of PR.

Author: oech3

.github/workflows/GnuTests.yml

@@ -80,7 +80,7 @@ jobs:
       run: |
         ## Install dependencies
         sudo apt-get update
-        sudo apt-get install -y autoconf autopoint bison texinfo gperf gcc g++ gdb python3-pyinotify jq valgrind libexpect-perl libacl1-dev libattr1-dev libcap-dev attr quilt
+        sudo apt-get install -y autoconf autopoint bison texinfo gperf gcc g++ gdb python3-pyinotify jq valgrind libexpect-perl libacl1-dev libattr1-dev libcap-dev libselinux1-dev attr quilt
     - name: Add various locales
       shell: bash
       run: |