Fix wrong line endings for LICENSE.txt and LICENSE_AFL.txt

[colinmollenhour]

I'm not sure what part of my git config is causing this but git will not let me ignore these files..

If I use e.g. git reset --hard HEAD to try to restore the original git just reconverts them..

This PR just changes the line endings from CRLF to LF. This is consistent with the .gitattributes file that was added in https://github.com/OpenMage/magento-lts/pull/3318 which specifies all .txt files are to be eol=lf.

Apologies if this was already discussed somewhere but it is quite annoying and figure this is the best way to prevent it from coming up.

Possible side effects

None? Perhaps some tools sniff out file hashes of these files?