Log Message:
devel/php-xdebug: update to 2.6.1

Wed, Aug 1, 2018 - xdebug 2.6.1

= Fixed bugs:

- Fixed issue #1525: Namespace filter does equality match instead of prefix match
- Fixed issue #1532: SIGABRT when using remote debugging and an error is thrown \ 
in eval() (Philip Hofstetter)
- Fixed issue #1543: Various memory leaks due to changes in (internal) string \ 
handling
- Fixed issue #1556: Crash when register_shutdown_function() is called with a \ 
function named call_user_func*
- Fixed issue #1557: Remove 'return' in void xdebug_build_fname
- Fixed issue #1568: Can't debug object properties that have numeric keys

+ Improvements:

- Fixed issue #1487: Re-enable IPv6 test on Travis