Add conditional platform flag for Android builds

This change adds a platform flag to the Docker build command when the
configuration platform is set to 'android'. By appending '--platform
linux/amd64', we ensure that the Docker build for V8 uses the correct
platform, aligning with similar logic used elsewhere in the build
system. This improvement helps maintain consistency and compatibility
across different build environments.

Author: irbull

build_system/docker_build.py

@@ -99,9 +99,10 @@ def target_cpu(value):
         image_name = self.get_v8_image_name(config)
 
         no_cache = " --no-cache" if hasattr(config, 'no_docker_cache') and config.no_docker_cache else ""
+        platform_flag = " --platform linux/amd64" if config.platform == "android" else ""
 
         print ("Building V8 docker image: " + config.inject_env(image_name))
-        self.exec_v8_cmd("docker build" + no_cache + " " + args_str + " -f Dockerfile -t \"" + image_name + "\" . ", config)
+        self.exec_v8_cmd("docker build" + no_cache +  platform_flag + " " + args_str + " -f Dockerfile -t \"" + image_name + "\" . ", config)
 
     def pre_build(self, config):
         print ("preparing " + config.platform + "@" + config.arch + " => " + config.name)