minor #5189 Create temporary linting file in system temp dir (keradus)
minor #5189 Create temporary linting file in system temp dir (keradus)

This PR was merged into the 2.15 branch.

Discussion
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Create temporary linting file in system temp dir

for whatever reason, it was created in cwd, let's move to tmp folder to not spam the current dir, if work is in progress of progress got interrupted before clearing up the files

![Screenshot from 2020-10-20 04-06-50](https://user-images.githubusercontent.com/2716794/96531732-959fd980-128a-11eb-8a81-64172da5ca75.png)

Commits
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c23e1b7f5 Create temporary linting file in system temp dir

kubawerlos/PHP-CS-Fixer,Slamdunk/PHP-CS-Fixer,keradus/PHP-CS-Fixer,SpacePossum/PHP-CS-Fixer,kubawerlos/PHP-CS-Fixer,Slamdunk/PHP-CS-Fixer,SpacePossum/PHP-CS-Fixer,FriendsOfPHP/PHP-CS-Fixer,gharlan/PHP-CS-Fixer,FriendsOfPHP/PHP-CS-Fixer,gharlan/PHP-CS-Fixer,keradus/PHP-CS-Fixer