Log Message:
Update php-xdebug to final released version 2.6.0

Changes since 2.6.0beta1:

[2018-01-29] — Xdebug 2.6.0

Fixed bugs

Fixed bug #1522: Remote debugging test failures on s390 (Big Endian).
[2018-01-23] — Xdebug 2.6.0RC2

Fixed bugs

Fixed bug #1521: xdebug_gc_stats.* missing from 2.6.0RC1 tarball.

[2018-01-22] — Xdebug 2.6.0RC1

Added features

Fixed bug #1506: Add garbage collection statistics feature (Benjamin Eberlei).
Fixed bug #1507: Add functions to access Zend Engine garbage collection metrics \ 
(Benjamin Eberlei).

Improvements

Fixed bug #1510: Change switch/case "break intentionally missing" \ 
comments to use GCC 7's new "fallthrough" attribute.
Fixed bug #1511: Detect and use compiler flags through new configure option.
Fixed bugs

Fixed bug #1335: Debugging with PhpStorm sometimes gives "can not get \ 
property".
Fixed bug #1454: Invalid memory read or segfaults from a __call() method.
Fixed bug #1508: Code coverage filter not checked in xdebug_common_assign_dim \ 
handler.
Fixed bug #1509: Code coverage missing for case inside switch with PHP 7.2.
Fixed bug #1512: Xdebug does not properly encode and escape properties with \ 
quotes and \0 characters.
Fixed bug #1514: Variable names with a NULL char are cut off at NULL char.
Fixed bug #1515: Object property names with a NULL char are cut off at NULL char.
Fixed bug #1516: Can't fetch variables or object properties which have \0 \ 
characters in them.
Fixed bug #1517: Notifications incorrectly specify the error type in \ 
"type_string" instead of "type".