Fixes a failing test case in PHP (Zend/tests/bug74093.phpt). See
<https://github.com/php/php-src/pull/7555/files> for upstream status.
* gnu/packages/php.scm (php)[source]: Add patch.
* gnu/packages/patches/php-bug-74093-test.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
Signed-off-by: Tobias Geerinckx-Rice <me@tobias.gr>
