add xref build step

tsantero · tsantero · commit 61d8925c7032 · 2015-08-07T19:13:00.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -9,6 +9,7 @@ otp_release:
   - R15B03
 script:
   - make dialyzer
+  - make xref
   - make
   - make test
 notifications:
