Add runkit support for PHP 5.6

Signed-off-by: Michal Čihař <michal@cihar.com>
This patch works only for 5.6

Signed-off-by: Michal Čihař <michal@cihar.com>
Revert "Split up Travis PHP config snippets"

This reverts commit 6cd819a92efaf0c9124a92045c180f96d0b15aa4.
Revert "Configure timezone for Travis tests"

This reverts commit 39a953fddd66c6e3d758fcf630fdd6fcc2932c4f.
Set timezone in PHP snippet

There is no clean way to adjust HHVM settings from Travis, see
https://github.com/travis-ci/travis-ci/issues/2523

Caused by HHVM configuration no longer including timezone settings, see
https://github.com/travis-ci/travis-ci/issues/2812

Signed-off-by: Michal Čihař <michal@cihar.com>
Merge branch 'runkit'