Attempt trusty instead of precise on Travis build.

midnight-miner · midnight-miner · commit 898ac5f1a95d · 2017-08-17T02:25:08.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,11 +7,7 @@
 #   IPv6 support
 
 sudo: required
-dist: precise
-group: legacy
-
-sudo: required
-dist: precise
+# dist: precise
 group: legacy
 
 os: linux
