travis: add dom0 and Fedora VM builds for R4.1

.travis.yml

@@ -11,6 +11,9 @@ script:
  - ~/qubes-builder/scripts/travis-build
 env:
  - DIST_DOM0=fc25 USE_QUBES_REPO_VERSION=4.0 USE_QUBES_REPO_TESTING=1
+ - DIST_DOM0=fc29 USE_QUBES_REPO_VERSION=4.1 USE_QUBES_REPO_TESTING=1
+ - DISTS_VM=fc30 USE_QUBES_REPO_VERSION=4.1 USE_QUBES_REPO_TESTING=1
+ - DISTS_VM=fc31 USE_QUBES_REPO_VERSION=4.1 USE_QUBES_REPO_TESTING=1
 
 # don't build tags which are meant for code signing only
 branches: