[libxml2] Add --with-minimum build to CI tests

[Nick Wellnhofer <nwellnhof src gnome org>]

commit ad098030adf0af579a512059eaf6196d55aa93af
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Thu Apr 21 06:23:55 2022 +0200

    Add --with-minimum build to CI tests

 .gitlab-ci.yml | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6f6d80cc..bb3c3723 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -16,10 +16,12 @@
   # WORKDIR /tests
   # RUN curl https://www.w3.org/XML/Test/xmlts20080827.tar.gz |tar xz
   image: registry.gitlab.gnome.org/gnome/libxml2
+  variables:
+    BASE_CONFIG: "--with-ftp --with-legacy --with-xptr-locs"
   script:
     - |
       ln -s /tests/xmlconf
-      sh autogen.sh --with-ftp --with-legacy --with-xptr-locs $CONFIG
+      sh autogen.sh $BASE_CONFIG $CONFIG
       make -j$(nproc) V=1 CFLAGS="$CFLAGS -Werror"
       make CFLAGS="$CFLAGS -Werror" check
 
@@ -28,6 +30,12 @@ gcc:
   variables:
     CFLAGS: "-O2 -std=c89 -D_XOPEN_SOURCE=700"
 
+gcc:minimum:
+  extends: .test
+  variables:
+    BASE_CONFIG: "--with-minimum"
+    CFLAGS: "-O2"
+
 gcc:python3:
   extends: .test
   variables: