merged branch pborreli/fix-travis (PR #6039)

This PR was merged into the master branch.

Commits
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9843d29 Fix PHP 5.4 segfault

Discussion
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Fix travis PHP 5.4 segfault

This is a well known issue :
https://bugs.php.net/bug.php?id=53976
https://bugs.php.net/bug.php?id=51091

Author: fabpot

.travis.yml

@@ -9,3 +9,5 @@ before_script:
     - COMPOSER_ROOT_VERSION=dev-master composer --prefer-source --dev install
     - php src/Symfony/Component/Locale/Resources/data/build-data.php
     - export USE_INTL_ICU_DATA_VERSION=1
+
+script: phpunit -dzend.enable_gc=0