Multi-arch awareness for heroku-24+ in bin/compile

Closes heroku#717

GUS-W-15158300

bin/compile

@@ -226,7 +226,12 @@ mkdir -p $COMPOSER_HOME
 
 status "Bootstrapping..."
 
-s3_url="https://lang-php.s3.us-east-1.amazonaws.com/dist-${STACK}-stable/"
+if [[ $STACK == heroku-2[02] ]]; then
+	stack_locator=$STACK
+else
+	stack_locator="${STACK}-$(dpkg --print-architecture)"
+fi
+s3_url="https://lang-php.s3.us-east-1.amazonaws.com/dist-${stack_locator}-stable/"
 # prepend the default repo to the list configured by the user
 # list of repositories to use is in ascening order of precedence
 export_env_dir "$env_dir" '^HEROKU_PHP_PLATFORM_REPOSITORIES$'