[travis] Use hhvm-stable instead of discontinued hhvm-3.12

nicolas-grekas · nicolas-grekas · commit 2ac1586984ee · 2016-10-04T11:26:48.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -18,7 +18,7 @@ env:
 matrix:
     include:
         # Use the newer stack for HHVM as HHVM does not support Precise anymore since a long time and so Precise has an outdated version
-        - php: hhvm-3.12
+        - php: hhvm-stable
           sudo: required
           dist: trusty
           group: edge
