[gimp/wip/Jehan/win-native-builds-failing] build: use older GObject Introspection for native Windows build.

[Jehan <jehanp src gnome org>]

commit 918b6bcc62a8f98c66b675622f77c413a4161fc2
Author: Jehan <jehan girinstud io>
Date:   Thu Sep 30 18:21:28 2021 +0200

    build: use older GObject Introspection for native Windows build.

 build/windows/gitlab-ci/build-gimp-msys2.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/build/windows/gitlab-ci/build-gimp-msys2.sh b/build/windows/gitlab-ci/build-gimp-msys2.sh
index abca02aff1..ed75b6b262 100644
--- a/build/windows/gitlab-ci/build-gimp-msys2.sh
+++ b/build/windows/gitlab-ci/build-gimp-msys2.sh
@@ -81,7 +81,10 @@ export XDG_DATA_DIRS="${GIMP_PREFIX}/share:/mingw64/share/"
 mkdir -p _ccache
 export CCACHE_BASEDIR="$(pwd)"
 export CCACHE_DIR="${CCACHE_BASEDIR}/_ccache"
-export CC="ccache gcc"
+
+# XXX Do not enable ccache this way because it breaks
+# gobject-introspection rules. Let's see later for ccache.
+#export CC="ccache gcc"
 
 ccache --zero-stats
 ccache --show-stats