minor #931 Ignore correct PHP CS Fixer config file in .gitattributes (jmsche)

This PR was submitted for the 2.x branch but it was merged into the 1.x branch instead.

Discussion
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Ignore correct PHP CS Fixer config file in .gitattributes

Commits
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6ec66a3 Ignore correct PHP CS Fixer config file in .gitattributes

Author: fabpot

.gitattributes

@@ -1,7 +1,7 @@
 /.github export-ignore
 /.gitattributes export-ignore
 /.gitignore export-ignore
-/.php_cs.dist export-ignore
+/.php-cs-fixer.dist.php export-ignore
 /.travis.yml export-ignore
 /phpunit.xml.dist export-ignore
 /tests export-ignore