Enable Xdebug for HHVM

Author: oittaa

.travis.yml

@@ -12,7 +12,6 @@ php:
 matrix:
     allow_failures:
     - php: nightly
-    - php: hhvm
 
 os:
   - linux
@@ -31,6 +30,7 @@ before_script:
 
 script:
  - mkdir -p build/logs
+ - if [[ "$TRAVIS_PHP_VERSION" =~ '^hhvm' ]]; then echo 'xdebug.enable = On' >> /etc/hhvm/php.ini; fi
  - phpunit --stderr --coverage-clover build/logs/clover.xml
 
 after_script:
@@ -42,4 +42,4 @@ after_success:
 cache:
   directories:
   - vendor
-  - $HOME/.cache/composer
+  - $HOME/.cache/composer