ci: ASan all build steps on arch

.builds/archlinux.yml

@@ -10,7 +10,7 @@ sources:
 tasks:
    - prepare: |
       cd seatd
-      meson -Dlogind=enabled -Dseatd=enabled -Dbuiltin=enabled build
+      meson -Db_sanitize=address -Dlogind=enabled -Dseatd=enabled -Dbuiltin=enabled build
    - build: |
       cd seatd
       ninja -C build
@@ -23,9 +23,6 @@ tasks:
       [ -z "$(ls -A build/meson-logs/scanbuild/ 2>/dev/null)" ]
    - smoketest: |
       cd seatd
-      rm -rf build
-      meson -Db_sanitize=address -Dlogind=enabled -Dseatd=enabled -Dbuiltin=enabled build
-      ninja -C build
       timeout -s KILL 30s ./.builds/smoketest-seatd.sh
    - smoketest-builtin: |
       cd seatd