Allow different trait error message

Since php/php-src@8731c95
the trait error message is different.

Author: mbeccati

tests/end-to-end/generic/phar-extension-suppressed.phpt

@@ -10,4 +10,4 @@ $_SERVER['argv'][] = '--no-extensions';
 require_once __DIR__ . '/../../bootstrap.php';
 PHPUnit\TextUI\Command::main();
 --EXPECTF--
-Fatal error: Trait %sPHPUnit\ExampleExtension\TestCaseTrait%s not found in %A
+Fatal error:%sTrait %sPHPUnit\ExampleExtension\TestCaseTrait%s not found in %A