[TASK] Travis-ci: Disable apc in PHP 5.3

apc on cli seems to be flaky, disable this php module for
now to see if that help stabilizing travis-ci builds again.

Change-Id: I7e6caa6c2c2d70a26e217e8fbf10a2d79b01f335
Releases: 6.3, 6.2
Reviewed-on: https://review.typo3.org/31404
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn