gitlab-ci.d/buildtest-template: Simplify the configure step

It's easier to use ${TARGETS:+--target-list="$TARGETS"} to add
a --target-list parameter depending on whether the TARGETS variable
is set or not.

Message-Id: <20230207201447.566661-5-thuth@redhat.com>
Reviewed-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

.gitlab-ci.d/buildtest-template.yml

@@ -11,12 +11,10 @@
       fi
     - mkdir build
     - cd build
-    - if test -n "$TARGETS";
-      then
-        ../configure --enable-werror --disable-docs ${LD_JOBS:+--meson=git} $CONFIGURE_ARGS --target-list="$TARGETS" ;
-      else
-        ../configure --enable-werror --disable-docs ${LD_JOBS:+--meson=git} $CONFIGURE_ARGS ;
-      fi || { cat config.log meson-logs/meson-log.txt && exit 1; }
+    - ../configure --enable-werror --disable-docs
+          ${LD_JOBS:+--meson=git} ${TARGETS:+--target-list="$TARGETS"}
+          $CONFIGURE_ARGS ||
+      { cat config.log meson-logs/meson-log.txt && exit 1; }
     - if test -n "$LD_JOBS";
       then
         ../meson/meson.py configure . -Dbackend_max_links="$LD_JOBS" ;