misc: Add util/packet_pb2.py to .gitignore.

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Change-Id: I077fe1ad89b65716a829b783a8b9c6e23b4d0b6b
Reviewed-on: https://gem5-review.googlesource.com/5006
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
1 file changed