ci: use command 'all' instead of 'build' for waf

The command build uses 'bin' programs group by default. By using the command
'all', we tell the build system to build all programs.

Tools/scripts/build_ci.sh

@@ -68,7 +68,7 @@ for t in $CI_BUILD_TARGET; do
         echo "Starting waf build for board ${t}..."
         $waf configure --board $t
         $waf clean
-        $waf ${build_concurrency[$t]} build
+        $waf ${build_concurrency[$t]} all
         if [[ $t == linux ]]; then
             $waf check
         fi