Allow build failure on rbx

ignisf · ignisf · commit 413cf31fce51 · 2016-09-03T13:26:53.000+03:00
It seems that travis has dropped rbx on Ubuntu 14.04.
diff --git a/.travis.yml b/.travis.yml
@@ -20,6 +20,7 @@ matrix:
     - rvm: 1.9.3
   allow_failures:
     - rvm: 1.9.3
+    - rvm: rbx
   fast_finish: true
 dist: trusty
 addons:
