Strict warning: Creating default object
Applying patches is not actually a drupal specific issue and would be better on stack exchange, however there is a drupal documentation page so...

Check out the applying patches documentation.

However having said that, if you read that issue then you can see that patch was committed to that module 3 years ago and if you are using the latest release of the boron module (7.x-1.4) then that patch is already in there.

If you are applying the patch to something that isn't the boron theme then it will likely not work.