Make Travis more chatty.

Include the logs in the report after failing.
diff --git a/.travis.yml b/.travis.yml
index dbc2347..6aca79e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,6 +19,8 @@
 - tests/scripts/test-ref-configs.pl
 - tests/scripts/curves.pl
 - tests/scripts/key-exchanges.pl
+after_failure:
+- tests/scripts/travis-log.sh
 env:
   global:
     secure: "barHldniAfXyoWOD/vcO+E6/Xm4fmcaUoC9BeKW+LwsHqlDMLvugaJnmLXkSpkbYhVL61Hzf3bo0KPJn88AFc5Rkf8oYHPjH4adMnVXkf3B9ghHCgznqHsAH3choo6tnPxaFgOwOYmLGb382nQxfE5lUdvnM/W/psQjWt66A1+k="