Use LF line endings in Painless generated files (#26822)
Use LF line endings in Painless generated files (#26822)

Right now if you run `gradle regen` on Windows you'll get `CRLF` line
endings on all the ANTLR generated files because we run
```
    ant.fixcrlf(srcdir: outputPath) {
      patternset(includes: 'Painless*.java')
    }
```

The docs for fixcrlf say that the default line endings that it
corrects to is based on the OS:
https://ant.apache.org/manual/Tasks/fixcrlf.html

This change locks it to `LF`.
rajanm/elasticsearch,mjason3/elasticsearch,scorpionvicky/elasticsearch,kalimatas/elasticsearch,gingerwizard/elasticsearch,markwalkom/elasticsearch,scorpionvicky/elasticsearch,mjason3/elasticsearch,rajanm/elasticsearch,nknize/elasticsearch,gingerwizard/elasticsearch,HonzaKral/elasticsearch,coding0011/elasticsearch,GlenRSmith/elasticsearch,markwalkom/elasticsearch,scorpionvicky/elasticsearch,fred84/elasticsearch,kalimatas/elasticsearch,gfyoung/elasticsearch,mjason3/elasticsearch,wangtuo/elasticsearch,markwalkom/elasticsearch,GlenRSmith/elasticsearch,markwalkom/elasticsearch,rajanm/elasticsearch,uschindler/elasticsearch,GlenRSmith/elasticsearch,wenpos/elasticsearch,rajanm/elasticsearch,fred84/elasticsearch,scottsom/elasticsearch,wangtuo/elasticsearch,ThiagoGarciaAlves/elasticsearch,HonzaKral/elasticsearch,maddin2016/elasticsearch,gfyoung/elasticsearch,markwalkom/elasticsearch,coding0011/elasticsearch,fred84/elasticsearch,qwerty4030/elasticsearch,uschindler/elasticsearch,masaruh/elasticsearch,fred84/elasticsearch,s1monw/elasticsearch,ThiagoGarciaAlves/elasticsearch,scottsom/elasticsearch,scottsom/elasticsearch,GlenRSmith/elasticsearch,kalimatas/elasticsearch,gingerwizard/elasticsearch,gingerwizard/elasticsearch,s1monw/elasticsearch,nknize/elasticsearch,robin13/elasticsearch,robin13/elasticsearch,kalimatas/elasticsearch,s1monw/elasticsearch,gfyoung/elasticsearch,gingerwizard/elasticsearch,pozhidaevak/elasticsearch,robin13/elasticsearch,coding0011/elasticsearch,pozhidaevak/elasticsearch,mjason3/elasticsearch,pozhidaevak/elasticsearch,scorpionvicky/elasticsearch,masaruh/elasticsearch,ThiagoGarciaAlves/elasticsearch,coding0011/elasticsearch,rajanm/elasticsearch,masaruh/elasticsearch,ThiagoGarciaAlves/elasticsearch,maddin2016/elasticsearch,ThiagoGarciaAlves/elasticsearch,gingerwizard/elasticsearch,gfyoung/elasticsearch,qwerty4030/elasticsearch,kalimatas/elasticsearch,uschindler/elasticsearch,rajanm/elasticsearch,wenpos/elasticsearch,wenpos/elasticsearch,wangtuo/elasticsearch,uschindler/elasticsearch,scottsom/elasticsearch,wangtuo/elasticsearch,markwalkom/elasticsearch,s1monw/elasticsearch,fred84/elasticsearch,maddin2016/elasticsearch,HonzaKral/elasticsearch,maddin2016/elasticsearch,nknize/elasticsearch,ThiagoGarciaAlves/elasticsearch,uschindler/elasticsearch,qwerty4030/elasticsearch,s1monw/elasticsearch,gfyoung/elasticsearch,masaruh/elasticsearch,qwerty4030/elasticsearch,masaruh/elasticsearch,qwerty4030/elasticsearch,robin13/elasticsearch,wangtuo/elasticsearch,maddin2016/elasticsearch,GlenRSmith/elasticsearch,nknize/elasticsearch,HonzaKral/elasticsearch,scorpionvicky/elasticsearch,robin13/elasticsearch,pozhidaevak/elasticsearch,pozhidaevak/elasticsearch,nknize/elasticsearch,gingerwizard/elasticsearch,scottsom/elasticsearch,coding0011/elasticsearch,mjason3/elasticsearch,wenpos/elasticsearch,wenpos/elasticsearch