.travis.yml: bump to xcode8

diff --git a/.travis.yml b/.travis.yml
index a70c331..ef62ad0 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -39,9 +39,13 @@ matrix:
       compiler: clang
       env: WAFOPTS="--with-target-platform=ios --disable-avcodec" AUBIO_NOTESTS=1
 
+# use trusty
 dist: trusty
 sudo: required
 
+# use xcode8
+osx_image: xcode8
+
 addons:
   apt:
     packages: