Revise apt.txt and verify to install programs that install to /usr/bin instead of /usr/games

tests/venv/apt-packages/apt.txt

@@ -3,6 +3,6 @@
 gfortran
 
 # testing to see if all packages get installed
-rolldice
-sl
+unp
+byacc
 

tests/venv/apt-packages/verify

@@ -1,5 +1,5 @@
 #!/bin/bash
 set -euo pipefail
 which gfortran
-which rolldice
-which sl
+which unp
+which byacc