Use oraclejdk8 in travis config file

Drilon Reçica · Drilon Reçica · commit 6430e452bfea · 2018-06-28T11:48:50.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,7 @@
 language: android
 sudo: required
 dist: trusty
-jdk: oraclejdk
+jdk: oraclejdk8
 
 branches:
   only:
