Force update of libarchive in CentOS 8 image

Otherwise cmake breaks as it requires a newer version without properly
listing that in its dependencies.

diff --git a/.travis/centos8/Dockerfile b/.travis/centos8/Dockerfile
index 86bb74a703b9bd078774333ad9762187f235d747..8beec7e2113f4910ab3345d722d80ed6876d3cc0 100644 (file)
--- a/.travis/centos8/Dockerfile
+++ b/.travis/centos8/Dockerfile
@@ -6,6 +6,8 @@ RUN dnf -y install dnf-plugins-core
 RUN dnf -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
 RUN dnf config-manager --set-enabled powertools
 RUN dnf -y install xorg-x11-server-source
+# Too old in image so breaks cmake
+RUN dnf -y update libarchive
 
 RUN useradd -s /bin/bash -m rpm
 RUN echo >> /etc/sudoers