Ports: Update launcher path to Quake II

The launcher was not created as a result of the path not being
absolute. Also set a more commonly used title for the launcher.

Ports/quake2/package.sh

@@ -15,7 +15,7 @@ configopts=(
 depends=('SDL2')
 launcher_name='Quake II'
 launcher_category='Games'
-launcher_command='quake2'
+launcher_command='/usr/local/bin/quake2'
 
 configure() {
     run cmake "${configopts[@]}"