jenkins: www: Grant write permissions on cache

Change-Id: Ia9cceb0aba2edda378fd991136326df2c594834b
diff --git a/jenkins/www/leaf-www.groovy b/jenkins/www/leaf-www.groovy
index 0b138c6..f7c3f4e 100644
--- a/jenkins/www/leaf-www.groovy
+++ b/jenkins/www/leaf-www.groovy
@@ -20,6 +20,7 @@
                         ssh jenkins@$MASTER_IP git -C /var/www/leafos.org/ reset --hard
                         ssh jenkins@$MASTER_IP git -C /var/www/leafos.org/ pull ${GERRIT_URL} ${GERRIT_REFSPEC}
                         ssh jenkins@$MASTER_IP "cd /var/www/leafos.org; composer install"
+                        ssh jenkins@$MASTER_IP chmod -R a+rwx /var/www/leafos.org/var/cache/
                 '''
             }
         }