[gimp/wip/schumaml/crossraods-optimization] gitlab-ci: add i386 architecture for win32 to get wine32

[Michael Schumacher <schumaml src gnome org>]

commit 0d3e19bd50ff71add13741dcfb7c835d300337f3
Author: Michael Schumacher <schumaml gmx de>
Date:   Wed Dec 9 22:12:47 2020 +0100

    gitlab-ci: add i386 architecture for win32 to get wine32

 build/docker/CI/Dockerfile.win32 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/build/docker/CI/Dockerfile.win32 b/build/docker/CI/Dockerfile.win32
index fe0599709d..3ea38a4e6c 100644
--- a/build/docker/CI/Dockerfile.win32
+++ b/build/docker/CI/Dockerfile.win32
@@ -1,8 +1,8 @@
-FROM i386/debian:testing
+FROM debian:testing
 ARG XDG_DATA_HOME
 
 # always run apt-get update and apt-get install in the same cachable layer
-RUN apt-get update && apt-get install -y --no-install-recommends \
+RUN dpkg --add-architecture i386 && apt-get update && apt-get install -y --no-install-recommends \
     build-essential cpio g++-mingw-w64-i686 gcc-mingw-w64-i686 git intltool \
     libgdk-pixbuf2.0-dev libglib2.0-bin meson pkg-config python3 python3-distutils \
     python3-docutils python3-pip rpm wine wine32 xsltproc