Avoid exts on hhvm

.travis.yml

@@ -22,9 +22,9 @@ matrix:
         - php: nightly
 
 before_script:
-  - echo "extension = redis.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
-  - echo "extension = mongodb.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
-  - echo "extension = amqp.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
+  - if [[ $TRAVIS_PHP_VERSION = hhvm* ]]; then echo "extension = redis.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
+  - if [[ $TRAVIS_PHP_VERSION = hhvm* ]]; then echo "extension = mongodb.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
+  - if [[ $TRAVIS_PHP_VERSION = hhvm* ]]; then echo "extension = amqp.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi
   - if [ "$deps" == "low" ]; then composer update --prefer-dist --prefer-lowest --prefer-stable; fi
   - if [ "$deps" != "low" ]; then composer install --prefer-dist; fi