misc: git ignore file udpated

Change-Id: Ib2c7a7d26e7121dd082ca55a7c7ccf53fc47572c
Reviewed-on: https://gem5-review.googlesource.com/4240
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
1 file changed