[gtk/creiter-glib-sub-test] try disabling debug

[Christoph Reiter <creiter src gnome org>]

commit 54645d3a311a8d10a9d6d083abe8a28ecbe11c88
Author: Christoph Reiter <creiter src gnome org>
Date:   Sat Jan 26 17:19:21 2019 +0100

    try disabling debug

 .gitlab-ci.yml           | 4 ++--
 .gitlab-ci/test-msys2.sh | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2860ead649..b60004ae1e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -37,9 +37,9 @@ fedora-x86_64:
     key: "%CI_JOB_NAME%"
     <<: *cache-paths
 
-msys2-mingw64:
+msys2-mingw32:
   variables:
-    MSYSTEM: "MINGW64"
+    MSYSTEM: "MINGW32"
     CHERE_INVOKING: "yes"
   <<: *mingw-defaults
 
diff --git a/.gitlab-ci/test-msys2.sh b/.gitlab-ci/test-msys2.sh
index 3abaf9d083..9f1883dcf3 100644
--- a/.gitlab-ci/test-msys2.sh
+++ b/.gitlab-ci/test-msys2.sh
@@ -42,6 +42,7 @@ ccache --zero-stats
 ccache --show-stats
 export CCACHE_DISABLE=true
 meson \
+    --buildtype plain \
     -Denable-x11-backend=false \
     -Denable-wayland-backend=false \
     -Denable-win32-backend=true \