travis: explicitly set the build dist to `precise`

See https://blog.travis-ci.com/2017-07-11-trusty-as-default-linux-is-coming

Signed-off-by: VirtualTam <virtualtam@flibidi.net>

diff --git a/.travis.yml b/.travis.yml
index 59b86c08e45e5ba21b5ff6fb821e426b50eb7c51..26535ad34f66fbdb68adb9446ad386ee057b3707 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,5 @@
 sudo: false
+dist: precise
 language: php
 addons:
   apt: