Add EAGLE backup files to .gitignore
Add EAGLE backup files to .gitignore

Change-Id: I8eb70dcf812c00d593bf689e2e96657135468916
Reviewed-on: https://robertou.com/gerrit/174
Reviewed-by: Kyle Zentner <f75b86e3af539008d20a21b76724217a6a08bb10@pioneers.berkeley.edu>
Tested-by: Jenkins CI

cduck/tenshi,pioneers/tenshi,SamboyKirk/tenshi,JaronArmiger/tenshi,cduck/tenshi,pioneers/tenshi,hozhu123/tenshi,cduck/tenshi,hozhu123/tenshi,cduck/tenshi,tobinsarah/tenshi,jarzofjam/tenshi,jessicakam/tenshi,jessicakam/tenshi,chuen0630/tenshi,hozhu123/tenshi,jessicakam/tenshi,tobinsarah/tenshi,SamboyKirk/tenshi,hozhu123/tenshi,tobinsarah/tenshi,jarzofjam/tenshi,tobinsarah/tenshi,zentner-kyle/tenshi-old,JaronArmiger/tenshi,tobinsarah/tenshi,jarzofjam/tenshi,pioneers/tenshi,JaronArmiger/tenshi,JaronArmiger/tenshi,jessicakam/tenshi,cduck/tenshi,JaronArmiger/tenshi,jarzofjam/tenshi,SamboyKirk/tenshi,pioneers/tenshi,SamboyKirk/tenshi,abhishyantkhare/tenshi,abhishyantkhare/tenshi,pioneers/tenshi,jessicakam/tenshi,zentner-kyle/tenshi-old,chuen0630/tenshi,chuen0630/tenshi,hozhu123/tenshi,hozhu123/tenshi,tobinsarah/tenshi,jessicakam/tenshi,JaronArmiger/tenshi,chuen0630/tenshi,abhishyantkhare/tenshi,SamboyKirk/tenshi,abhishyantkhare/tenshi,jarzofjam/tenshi,abhishyantkhare/tenshi,hozhu123/tenshi,zentner-kyle/tenshi-old,tobinsarah/tenshi,chuen0630/tenshi,zentner-kyle/tenshi-old,jessicakam/tenshi,cduck/tenshi,zentner-kyle/tenshi-old,chuen0630/tenshi,abhishyantkhare/tenshi,jarzofjam/tenshi,chuen0630/tenshi,SamboyKirk/tenshi,zentner-kyle/tenshi-old,pioneers/tenshi,pioneers/tenshi,jarzofjam/tenshi,SamboyKirk/tenshi,abhishyantkhare/tenshi,JaronArmiger/tenshi,cduck/tenshi