Travis: allow rbx-19mode to fail (Issue#34).

mvidner · mvidner · commit 03b392f7043a · 2012-10-17T09:57:00.000+02:00
It has always been broken, filter out the noise for now. mvidner#34
diff --git a/.travis.yml b/.travis.yml
@@ -7,3 +7,6 @@ rvm:
   - rbx-19mode
   - rbx-18mode
 gemfile: Gemfile.ci
+matrix:
+  allow_failures:
+    - rvm: rbx-19mode
