Make OSX test failures fail the Travis CI build.

.travis.yml

@@ -2,11 +2,6 @@ language: c
 
 matrix:
   include:
-    # OSX build comes first because Travis queues builds in order. The OSX
-    # builds are often pushed on a very long (100-200 jobs) backlog, so they get
-    # highest priority in our build sequence.
-    - env: JOB=toxcore ENV=osx RUN_TESTS=false
-      os: osx
     - env: JOB=toxcore ENV=osx RUN_TESTS=true
       os: osx
     - env: JOB=hstox ENV=linux
@@ -23,8 +18,6 @@ matrix:
       services:
         - docker
   fast_finish: true
-  allow_failures:
-    - env: JOB=toxcore ENV=osx RUN_TESTS=true
 
 addons:
   apt: