fix curl coverage error (#24595)

tools/coverage/paddle_coverage.sh

@@ -5,7 +5,7 @@ set -xe
 PADDLE_ROOT="$( cd "$( dirname "${BASH_SOURCE[0]}")/../../" && pwd )"
 
 # install lcov
-curl -o /lcov-1.14.tar.gz -s https://paddle-ci.gz.bcebos.com/coverage%2Flcov-1.14.tar.gz
+curl -o /lcov-1.14.tar.gz -x "" -s https://paddle-ci.gz.bcebos.com/coverage/lcov-1.14.tar.gz
 tar -xf /lcov-1.14.tar.gz -C /
 cd /lcov-1.14
 make install