build-rpm: Work around cmake package bug
build-rpm: Work around cmake package bug

Work around https://bugzilla.redhat.com/show_bug.cgi?id=1532293 by
upgrading cmake first before installing rpm-build.

weldr/welder-web,jkozol/welder-web,jkozol/welder-web,weldr/welder-web,jkozol/welder-web,jkozol/welder-web,weldr/welder-web,weldr/welder-web