gitlab: build android image with only aarch64

.gitlab-ci.yml

+stages:
+  - build_docker
+
+build:
+  stage: build_docker
+  image: docker
+  services:
+    - docker:dind
+  before_script:
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:android_arm64 || true
+    - docker build
+        --cache-from $CI_REGISTRY_IMAGE:android_arm64
+        --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
+        --tag $CI_REGISTRY_IMAGE:android_arm64
+        6.3-android-aqt
+    - docker push $CI_REGISTRY_IMAGE:android_arm64

6.3-android-aqt/get_qt.sh

@@ -29,11 +29,13 @@ echo
 echo '--> Download & install the Qt library using aqt'
 echo
 
-for abi in armv7 arm64_v8a x86 x86_64; do
+for abi in arm64_v8a; do
     aqt install-qt -O "$QT_PATH" linux android "$QT_VERSION" "android_$abi"
 done
+
 aqt install-tool -O "$QT_PATH" linux desktop tools_cmake
 aqt install-tool -O "$QT_PATH" linux desktop tools_ninja
+
 # Host Qt needed for cross-compilation
 aqt install-qt -O "$QT_PATH" linux desktop "$QT_VERSION" gcc_64