Update rubygems in travis (for bundler)

(cherry picked from commit 2a5c0b379f0bc256cb92920e3be56139f5bcdc29)

diff --git a/build-scripts/travis.sh b/build-scripts/travis.sh
index e5fea142cba62b468539e6c2d5a902aebf00d195..776063fb53376c3d5c4f79016c3dfefaea4567fe 100755 (executable)
--- a/build-scripts/travis.sh
+++ b/build-scripts/travis.sh
@@ -303,6 +303,7 @@ install_auth() {
     ruby-json \
     rubygems-integration \
     socat"
+  run "gem update --system"
   run "gem install bundler --no-rdoc --no-ri"
   run "cd modules/remotebackend"
   run "ruby -S bundle install"