Add image for crosscompilation of open62541 to armhf, win32 and win64

.gitlab-ci.yml

@@ -8,8 +8,10 @@ build:
     - docker image build -t registry.git.rwth-aachen.de/acplt/build-docker-image/rte-build rte-build
     - docker image build -t registry.git.rwth-aachen.de/acplt/build-docker-image/rte-crossbuild rte-crossbuild
     - docker image build -t registry.git.rwth-aachen.de/acplt/build-docker-image/open62541-build open62541-build
+    - docker image build -t registry.git.rwth-aachen.de/acplt/build-docker-image/open62541-crossbuild open62541-crossbuild
     - docker push registry.git.rwth-aachen.de/acplt/build-docker-image/build-essential
     - docker push registry.git.rwth-aachen.de/acplt/build-docker-image/rte-build
     - docker push registry.git.rwth-aachen.de/acplt/build-docker-image/rte-crossbuild
     - docker push registry.git.rwth-aachen.de/acplt/build-docker-image/open62541-build
+    - docker push registry.git.rwth-aachen.de/acplt/build-docker-image/open62541-crossbuild
     - docker logout $CI_REGISTRY

open62541-crossbuild/Dockerfile

+FROM registry.git.rwth-aachen.de/acplt/build-docker-image/rte-build
+
+RUN apt-get update -qq && apt-get install -y -qq --no-install-recommends gcc-arm-linux-gnueabihf libc6-dev-armhf-cross gcc-mingw-w64-x86-64 g++-mingw-w64-x86-64 binutils-mingw-w64-x86-64 gcc-mingw-w64-i686 g++-mingw-w64-i686 binutils-mingw-w64-i686 && rm -rf /var/lib/apt/lists/*