retry docker build

Jenkinsfile

@@ -89,6 +89,7 @@ def pcStage(String stageName, Closure body) {
     checkout scm
 
     def dockerArgs = "--user=batman -v /tmp/comma_download_cache:/tmp/comma_download_cache -v /tmp/scons_cache:/tmp/scons_cache -e PYTHONPATH=${env.WORKSPACE}";
+    retry (3) {
       docker.build("openpilot-base:build-${env.GIT_COMMIT}", "-f Dockerfile.openpilot_base .").inside(dockerArgs) {
         timeout(time: 20, unit: 'MINUTES') {
           try {
@@ -108,6 +109,7 @@ def pcStage(String stageName, Closure body) {
       }
     }
   }
+  }
 }
 
 def setupCredentials() {